Writing B2 - Skills Practice: Written Expression

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| By MahauadCampodoni

MahauadCampodoni

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1/60 Questions

When ______________ chest pain, some doctors recommend that they take one full 325- milligram aspirin.
- Patients feel
- Feel impatient
- Do patients feel
- As patients feel

Writing B2 - Skills Practice: Written Expression - Quiz

About This Quiz

This section consists of a number of sentences with blanks, each followed by four answers choices.
Read the sentence and the answer choices. Choose the answer choice that best completes the sentence.

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2.

There __________ called Epstein-Barr which leaves people feeling chronically fatigued and feeling as if they have a recurring case of the flu.
- A viral
- In a disease
- A virus is
- Is a virus
Correct Answer

A. Is a virus

Explanation

This sentence begins with the place expression There. This sentence needs an inverted subject and verb following the introductory place expression to be complete. Answer D is the best answer because it contains the inverted subject and verb is a virus. Answer A contains an adjective, answer B contains a prepositional phrase, and answer C contains a subject and verb that are not inverted, so these answers are incorrect.

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3.

While ____________ those who are not working members of the press, press pins provide access to a press box for media members.
- Kept out
- Keeping out
- The keeper
- Was kept out
Correct Answer

A. Keeping out

Explanation

This sentence has a complete main clause press pins provide… and an incomplete reduced adverb clause while… This incomplete reduced adverb clause needs a reduced active verb to be complete. Answer B is the best answer because it contains the reduced verb keeping out. Answer A contains a reduced passive verb, answer C contains a noun, and answer D contains an unreduced verb, so these answers are incorrect.

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1
4.

Skin color is determined by a chemical called melanin, _____________ in greater or lesser amounts.
- Which human skin contains
- Human skin contains
- In human skin contains
- There is in human skin
Correct Answer

A. Which human skin contains

Explanation

This sentence has a main clause Skin color is determined… and an incomplete adjective clause in greater or lesser amounts. The adjective clause needs a connector, a subject, and a verb to be complete. Answer A is the best answer because it contains the connector which, the subject human skin, and the verb contains. Answer B, C, and D are each missing a connector, so these answers are incorrect.

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5.

For every disease-carrying toxin, there is an antitoxin which _________ out the effect of the toxin.
- Cancels
- The cancellation
- To cancel
- Cancelling
Correct Answer

A. Cancels

Explanation

This sentence has a main clause there is an antitoxin… and an incomplete adjective clause which… The adjective clause needs a verb to be complete. Answer A is the best answer because it contains the verb cancels. Answer B contains a noun, answer C contains an infinitive, and answer D contains an incomplete verb, so these answers are incorrect.

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6.

There ________ launched in 1958 that fell back to Earth and burned up in the atmosphere.
- A lunar probe was
- Was a lunar probe
- A lunar probe
- With a lunar probe
Correct Answer

A. Was a lunar probe

Explanation

This sentence begins with the place expression There. This sentence needs an inverted subject and verb following the introductory place expression to be complete. Answer B is the best answer because it contains the inverted subject and verb was a lunar probe. Answer A contains a subject and verb that are not inverted, answer C is missing a verb, and answer D contains a prepositional phrase, so these answers are incorrect.

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1
7.

On October 28, 1886, the Statue of Liberty, a gift from the people of France, __________ in New York Harbor by President Cleveland.
- To dedicate
- It dedicated
- Was dedicated
- Was dedicating
Correct Answer

A. Was dedicated

Explanation

This sentence has a complete reduced adjective clause a gift… and an incomplete main clause the Statue of Liberty… This incomplete main clause needs a passive verb to be complete because of the expression by President Cleveland. Answer C is the best answer because it contains the passive verb was dedicated. Answer A contains an infinitive, answer B contains an extra subject and an active verb, and answer D contains an active verb, so these answers are incorrect.

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8.

Most adults, including 78 percent of men and 61 percent of women, __________ that gender roles in marriage today are more equal than traditional.
- Say
- The say
- Saying
- To say
Correct Answer

A. Say

Explanation

This sentence has a complete reduced adjective clause including… and an incomplete main clause Most adults… This incomplete main clause needs a unreduced verb to be complete. Answer A is the best answer because it contains the unreduced verb say. Answer B contains an extra subject, answer C contains a reduced verb, and answer D contains an infinitive, so these answers are incorrect.

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1
9.

Although seismologists know __________, they are unable to predict with accuracy when or where a tremor might occur.
- What causes earthquakes
- What earthquakes
- Causes earthquakes
- That the quaking of the Earth
Correct Answer

A. What causes earthquakes

Explanation

This sentence contains a main clause they are unable… and an incomplete adverb clause Although seismologists know..., which needs an object to be complete. A noun clause can be used as the object of know, and a noun clause needs a connector, a subject, and a verb. Answer A is the best answer because it contains the connector/subject what and the verb causes. Answers B and D are each missing a verb, and answer C is missing a connector and a subject, so these answers are incorrect.

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10.

Galileo’s observations of the phases of Venus proved __________ formed the center of the planetary system.
- That the Sun
- The Sun is
- It is the Sun
- What is the Sun
Correct Answer

A. That the Sun

Explanation

This sentence has a main clause Galileo’s observations… proved… and an incomplete noun clause …formed the center… The noun clause needs a connector and a subject to be complete. Answer A is the best answer because it contains the connector that and the subject Sun. Answer B and C are each missing a noun clause connector, and answer D has an inverted subject and verb, so these answers are incorrect.

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11.

Edmund Halley, who had discovered Halley’s comet in 1682, __________ before he could again see the comet whose return he had accurately predicted.
- Died
- Dying
- On his death
- To die
Correct Answer

A. Died

Explanation

This sentence has an incomplete main clause Edmund Halley… and two adjective clauses who has discovered Halley’s comet… and whose return he had accurately predicted. The main clause needs a verb to be complete. Answer A is the best answer because it contains the verb died. Answer B contains an incomplete verb, answer C contains a prepositional phrase, and answers D contains an infinitive, so these answers are incorrect.

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12.

While ______________, Chu developed a way of trapping thousands of gas atoms using lasers.
- To work at Bell Laboratories
- Working at Bell Laboratories
- Worked at Bell Laboratories
- Was working at Bell Laboratories
Correct Answer

A. Working at Bell Laboratories

Explanation

This sentence has a complete main clause Chu developed… and an incomplete reduced adverb clause While… This incomplete reduced adverb clause needs a reduced active verb to be complete. Answer B is the best answer because it contains the reduced active verb working. Answer A contains an infinitive, answer C contains a reduced passive verb, and answer D contains an unreduced verb, so these answers are incorrect.

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1
13.

_____________ famous civil rights leader, Martin Luther King, Jr. was named winner of the Nobel Peace Prize in 1964.
- A
- Which was
- He was a
- Was a
Correct Answer

A. A

Explanation

This sentence has a complete main clause Martin Luther King, Jr. was named… and an incomplete reduced adjective clause …famous… This incomplete reduced adjective clause needs to be a complete phrase. Answer A is the best answer because it contains the article A, which completes the phrase. Answer B contains a connector/subject that cannot be uses at the beginning of a sentence and an extra verb, answer C contains an extra subject and a verb, and answers D contains an unreduced verb, so these answers are incorrect.

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14.

Should _________ help keeping their weight, blood pressure, pulse, and cholesterol down, swimming is an excellent activity.
- Adults need
- Needy adults
- To need
- Needs adults
Correct Answer

A. Adults need

Explanation

This sentence has a main clause swimming is... and an incomplete inverted conditional should… This sentence needs a subject and main verb to be complete. Answer A is the best answer because it contains a subject and main verb adults need. Answer B is missing a verb, answer C contains an infinitive, and answer C contains an inverted subject and verb, so these answers are incorrect.

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15.

While making the embarrassing mistake of wearing a scarlet garment instead of somber black, ___________, the atomic chemist and Quaker, discovered that he was color-blind.
- In John Dalton’s laboratory
- John Dalton was
- John Dalton
- John Dalton and
Correct Answer

A. John Dalton

Explanation

This sentence has a complete reduced adverb clause While making…, an incomplete main clause …discovered…, and a complete reduced adjective clause the atomic chemist and Quaker. This incomplete main clause needs a subject to be complete. Answer C is the best answer because it contains the subject John Dalton. Answer A contains a prepositional phrase, answer B contains an extra verb, and answer D contains an extra connector, so these answers are incorrect.

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16.

_________________ New York and New Jersey, the George Washington Bridge opened to traffic in 1931.
- Connecting
- Which was connected
- Connects
- It connects
Correct Answer

A. Connecting

Explanation

This sentence has a complete main clause the George Washington Bridge opened… and an incomplete reduced adjective clause …New York and New Jersey. This incomplete reduced adjective clause needs a reduced verb to be complete. Answer A is the best answer because it contains the reduced verb connecting. Answer B contains a connector/subject that cannot be used at the beginning of a sentence and an unreduced verb, answer C contains an unreduced verb, and answer D contains an extra subject and an unreduced verb, so these answers are incorrect.

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1
17.

Bees perform a complex dance ____________ other bees about the location of a good source of nectar.
- Tells
- Tell
- It tells
- That tells
Correct Answer

A. That tells

Explanation

This sentence has a complete main clause Bees perform… and an incomplete adjective clause …other bees. The adjective clause needs a connector, a subject, and a verb to be complete. Answer D is the best answer because it contains the connector/subject that and the verb tells. Answers A and B are each missing a connector or subject, and answer C is missing a connector, so these answers are incorrect.

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18.

While repositioning, cruise ships ___________ passengers for what is called a line voyage.
- The embarkation of
- Embark
- Embarking
- They embark
Correct Answer

A. Embark

Explanation

This sentence has a complete reduced adverb clause while repositioning and an incomplete main clause cruise ships… This incomplete main clause needs an unreduced verb to be complete. Answer B is the best answer because it contains the unreduced verb embark. Answer A contains a noun, answer C contains a reduced verb, and answer D contains an extra subject, so these answers are incorrect.

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1
19.

___________ floats or sinks is determined by its density rather than its weight.
- Whether an object
- Object if it
- Because an object
- An object
Correct Answer

A. Whether an object

Explanation

This sentence has an incomplete noun clause …floats or sinks as the subject of the verb is determined. The noun clause needs a connector and a subject to be complete. Answer A is the best answer because it contains the connector whether and the subject object. Answer B contains an extra subject, answer C contains an adverb clause connector instead of a noun clause connector, and answer D is missing a noun clause connector, so these answers are incorrect.

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20.

The anteater has a long sticky tongue, ___________ capture ants and termites from their nests.
- Which the use
- Uses it to
- It is used
- Which it uses to
Correct Answer

A. Which it uses to

Explanation

This sentence has a main clause The anteater has a long sticky tongue… and an incomplete adjective clause …capture ants and termites… The adjective clause needs a connector, a subject, and a verb to be complete. Answer D is the best answer because it contains the connector which, the subject it, and the verb uses. Answer A is missing a verb, and answers C and D are each missing a connector, so these answers are incorrect.

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21.

Scientists now know that the lack of an embryonic thumb in birds is why ____________ almost impossible for birds and dinosaurs to be related.
- Is
- It is
- Is it
- It
Correct Answer

A. It is

Explanation

This sentence has a main clause Scientist now know… and the question-word connector why. This sentence needs a subject and a verb following the connector why to be complete. Answer B is the best answer because it contains the subject and verb it is. Answer A is missing a subject, answer C contains an inverted subject and verb, and answer D is missing a verb, so these answers are incorrect.

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22.

After ______ seven years to journey to Saturn, the spacecraft Cassini will spend four years exploring Saturn, its rings, and its icy moons.
- Takes
- Taken
- Was taken
- Taking
Correct Answer

A. Taking

Explanation

This sentence has a complete main clause the spacecraft Cassini will spend… and an incomplete reduced adverb clause after… This incomplete reduced adverb clause needs a reduced active verb to be complete. Answer D is the best answer because it contains the reduced verb taking. Answers A and C each contain an unreduced verb, and answer B contains a reduced passive verb, so these answers are incorrect.

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1
23.

Although _____________ their jobs, a majority of workers expect to move on to other jobs within five years of starting their current jobs.
- To enjoy
- Enjoy
- The enjoyment
- Enjoying
Correct Answer

A. Enjoying

Explanation

This sentence has a complete main clause a majority of workers expect… and an incomplete reduced adverb clause Although… This incomplete reduced adverb clause needs a reduced verb to be complete. Answer D is the best answer because it contains the reduced verb enjoying. Answer A contains an infinitive, answer B contains an unreduced verb, and answer C contains a noun, so these answers are incorrect.

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1
24.

Although applied for in October of 1793, Eli Whitney’s patent for his cotton gin ________ until March of the following year.
- Granting
- It was not granted
- To grant
- Was not granted
Correct Answer

A. Was not granted

Explanation

This sentence has a complete reduced adverb clause Although applied… and an incomplete main clause Eli Whitney’s patent… This incomplete main clause needs an unreduced verb to be complete. Answer D is the best answer because it contains the unreduced verb was not granted. Answer A contains a reduced verb, answer B contains an extra subject, and answer C contains an infinitive, so these answers are incorrect.

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25.

In the sand of the northern California coast ____________ San Agustin, which is said to be loaded with gold.
- The galleon is lying
- Lies the galleon
- The galleon
- The galleon which lies
Correct Answer

A. Lies the galleon

Explanation

This sentence begins with the place expression In the sand of the northern California coast. This sentence needs an inverted subject and verb following the introductory place expression to be complete. Answer B is the best answer because it contains the inverted subject and verb lies the galleon. Answer A contains a subject and verb that are not inverted, answer C is missing a verb, and answer D contains an extra connector/subject and a subject and verb that are not inverted, so these answers are incorrect.

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26.

If introduced into avocado groves, the seed and stem weevils, seed moth, and fruit fly __________ the avocado industry in California.
- The ending
- May end
- To end
- They will end
Correct Answer

A. May end

Explanation

This sentence has a complete reduced adverb clause If introduced… and an incomplete main clause the seed and stem weevils, seed moth, and fruit fly… This incomplete main clause needs an unreduced verb to be complete. Answer B is the best answer because it contains the unreduced verb may end. Answer A contains a noun, answer C contains an infinitive, and answer D contains an extra subject, so these answers are incorrect.

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1
27.

The surgeon operating without delay on an inflamed appendix _______ a far more serious complication, which is the rupture of a germ-laden appendix.
- Which prevents
- Preventing
- Prevents
- Prevention
Correct Answer

A. Prevents

Explanation

This sentence has a complete reduced adjective clause operating… and an incomplete main clause The surgeon… This incomplete main clause needs an unreduced verb to be complete. Answer C is the best answer because it contains the unreduced verb prevents. Answer A contains an extra connector/subject, answer B contains a reduced verb, and answer D contains a noun, so these answers are incorrect.

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28.

Bank employees collect worn-out dollar bills, _____________ to a central office to be destroyed in a furnace.
- Who send them
- Which are sent
- Who are sent
- Are sent
Correct Answer

A. Which are sent

Explanation

This sentence has a main clause Bank employees collect… and an incomplete adjective clause …to a central office… The adjective clause needs a connector, a subject, and a verb to be complete. Answer B is the best answer because it contains the connector/subject which and the verb are sent. Answer A and C each contain a personal connector/ subject, which does not agree with the nonpersonal noun dollar bills, and answer D is missing a connector/subject, so these answers are incorrect.

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29.

The first mention of the cultivation of tea ___________ in a Chinese dictionary which dates about the year 350.
- Finding
- To be found
- It is found
- Can be found
Correct Answer

A. Can be found

Explanation

This sentence has an incomplete main clause The first mention… and an adjective clause …which dates… The main clause needs a verb for the sentence to be complete. Answer D is the best answer because it contains the verb can be found. Answer A has an incomplete verb, answer B has an infinitive, and answer C has an extra subject, so these answers are incorrect.

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30.

Lifestyle is more important __________ in a person’s lifespan.
- As genetics are
- With genes
- Genetically
- Than are genetics
Correct Answer

A. Than are genetics

Explanation

This sentence has a complete main clause Lifestyle is... and an incomplete comparative expression more important… A comparative can be followed by an inverted subject and verb. Answer D is the best answer because it contains part of a comparison than and the inverted subject and verb are genetics. Answer A contains an extra connector and the subject and verb are not inverted, answer B contains a prepositional phrase, and answer C contains an extra adverb, so these answers are incorrect.

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31.

Though racing toward the Milky Way galaxy at 300000 miles an hour, the Andromeda galaxy _________ with the Milky Way for about five billon years.
- Colliding
- Will not collide
- To collide
- The collision
Correct Answer

A. Will not collide

Explanation

This sentence has a complete reduced adverb clause Though racing… and an incomplete main clause the Andromeda galaxy… This incomplete main clause needs an unreduced verb to be complete. Answer B is the best answer because it contains the unreduced verb will not collide. Answer A contains a reduced verb, answer C contains an infinitive, and answer D contains a noun, so these answers are incorrect.

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32.

Unless _____________ as injury-free as possible, older athletes can have their activity and quality of life affected.
- The remnants of
- To remain
- Remaining
- Remain
Correct Answer

A. Remaining

Explanation

This sentence has a complete main clause older athletes can have… and an incomplete reduced adverb clause unless… This incomplete reduced adverb clause needs a reduced verb to be complete. Answer C is the best answer because it contains the reduced verb remaining. Answer A contains a noun, answer B contains an infinitive, and answer D contains an unreduced verb, so these answers are incorrect.

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1
33.

____________________ in the atmosphere is the temperature falling below freezing.
- Frost is produced
- Frost produces
- What produces frost
- What is frost
Correct Answer

A. What produces frost

Explanation

This sentence has a main verb is but needs a subject. A noun clause can be the subject of the verb is. A noun clause subject needs a connector, a subject, and a verb to be complete. Answer C is the best answer because it contains the connector/subject what and the verb produces. Answers A and B are each missing a noun clause connector, and answer D has inverted subject and verb, so these answers are incorrect.

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34.

There has been a string of recent technology advances aimed t building new engines which are more clean and efficient than _____________.
- To engineer
- Are current engines
- In engines currently
- Current
Correct Answer

A. Are current engines

Explanation

This sentence has a main clause There has been a string... and a comparative expression more… than… A comparative can be followed by an inverted subject and verb. Answer B is the best answer because it contains an inverted subject and verb are current engines. Answer A contains an infinitive, answer C contains a prepositional phrase, and answer D contains an adjective, so these answers are incorrect.

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35.

Environmentalists are earnestly trying to determine _____________ of the ozone layer over the poles.
- Is causing the deterioration
- What the cause of the deterioration
- What is causing the deterioration
- The deterioration is causing
Correct Answer

A. What is causing the deterioration

Explanation

This sentence has an incomplete main clause Environmentalists are earnestly trying to determine… The main clause needs a noun or a noun clause for the verb to determine to be complete. Answer C is the best answer because it contains a noun clause with a connector/subject what and a verb is causing. Answer A is missing a connector or subject, answer B is missing a verb, and answer D is missing a connector, so these answers are incorrect.

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36.

According to a recent survey, were _________ of telecommuters to lose their jobs, they would look for other telecommuting positions.
- To major
- If a majority
- A majority
- In the major
Correct Answer

A. A majority

Explanation

This sentence has a main clause they would look... and an incomplete inverted conditional were… This sentence needs a subject to be complete. Answer C is the best answer because it contains the subject a majority. Answer A contains an infinitive, answer B contains an extra connector, and answer D contains a prepositional phrase, so these answers are incorrect.

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37.

Only in the Civil War ___________ killed or wounded.
- Soldiers in America
- Were so many American soldiers
- Many in America
- So many American soldiers were
Correct Answer

A. Were so many American soldiers

Explanation

This sentence begins with the negative expression Only. This sentence needs an inverted subject and passive helping verb following the introductory negative expression to be complete. Answer B is the best answer because it contains the inverted subject and passive helping verb were so many American soldiers. Answers A and C are each missing a verb, and answer D contains a subject and verb that are not inverted, so these answers are incorrect.

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38.

The blue-ringed octopus, _____________ found in tropical lagoons, is so venomous that it can paralyze or kill a person in matter of minutes.
- Is
- Who is
- That
- Which is
Correct Answer

A. Which is

Explanation

This sentence has a complete main clause The blue-ringed octopus…is… and an incomplete adjective clause …found in… The adjective clause needs a connector, a subject, and a helping verb to be complete. Answer D is the best answer because it contains the connector/subject which and the helping verb is. Answers A is missing a connector and a subject, answer B contains a personal connector/subject, which does not agree with the nonpersonal noun octopus, and answer C is missing a verb, so these answers are incorrect.

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39.

Historical records ________________ were used in China for centuries before spreading to Europe.
- Suggesting that fireworks
- Fireworks
- That fireworks
- Suggest that fireworks
Correct Answer

A. Suggest that fireworks

Explanation

This sentence has an incomplete main clause Historical records… and an incomplete noun clause …were used… The main clause needs a verb, and the noun clause needs and a connector for the sentence to be complete. Answer D is the best answer because it contains the main clause verb suggest, the connector that, and the noun clause subject fireworks. Answer A has an incomplete verb, answer B is missing a connector, and answer C is missing a verb, so these answers are incorrect.

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40.

In the halcyon days of the civil rights movement, a small group of dedicated lawyers, mostly black, ___________ carefully craft the strategy that led to the destruction of legal segregation.
- Which is able to
- Was able to
- Able to
- Were able
Correct Answer

A. Was able to

Explanation

This sentence has a complete reduced adjective clause mostly black and an incomplete main clause a small group… This incomplete main clause needs a singular verb to be complete. Answer B is the best answer because it contains the singular verb was. Answer A contains an extra connector/subject and a verb tense that is not logical, answer C contains an adjective, and answer D contains a plural verb, so these answers are incorrect.

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1
41.

_____________Lake Erie and the Hudson River, the Erie Canal opened in upstate New York in 1825.
- Linking
- It was linked
- Have been linking
- The linked
Correct Answer

A. Linking

Explanation

This sentence has a complete main clause the Erie Canal opened… and an incomplete reduced adjective clause …Lake Erie… This incomplete reduced adjective clause needs a reduced verb to be complete. Answer A is the best answer because it contains the reduced verb Linking. Answers B and D each contain an extra subject and an unreduced verb, and answer C contains an unreduced verb, so these answers are incorrect.

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42.

In addition to quitting smoking and controlling blood pressure and diet, people need to think about how ______________ stress to avert potentially fatal heart problems.
- Can they manage
- The management
- They manage
- Managing
Correct Answer

A. They manage

Explanation

This sentence has a main clause people need… and the question-word connector how. This sentence needs a subject and a verb following the connector how to be complete. Answer C is the best answer because it contains the subject and verb they manage. Answer A contains an inverted subject and verb, answer B is missing a verb, and answer D is missing a subject and contains an incomplete verb, so these answers are incorrect.

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43.

Subduction is the process _________ the ocean floor recycles itself.
- That
- Which is
- By which
- How
Correct Answer

A. By which

Explanation

This sentence has a main clause Subduction is the process… and an incomplete adjective clause …the ocean floor recycles... The adjective clause needs a prepositions and a connector to be complete. Answer C is the best answer because it contains the preposition by and the connector which. Answer A is missing a preposition, answer B is missing a preposition and also has an extra verb, and answer D uses a noun clause connector rather than an adjective clause connector, so these answers are incorrect.

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44.

The abundant grain harvest of North America can be credited to Norman Borlag, a little-known scientist ___________ modern strains of high-yield wheat.
- Which cultivated
- Cultivated
- Who cultivated
- The cultivation of
Correct Answer

A. Who cultivated

Explanation

This sentence has a complete main clause …grains harvests…can be credited… and an incomplete adjective clause ...modern strains…. The adjective clause needs a connector, a subject, and a verb to be complete. Answer C is the best answer because it contains the connector/subject who and the verb cultivated. Answer A contains a nonpersonal subject/connector that does not agree with the personal noun scientist, answer B is missing a connector or a subject, and answer D is missing a connector or a verb, so these answers are incorrect.

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45.

The birth of swing music can be traced to Battle of the Bands competitions ____________ at the Savoy Ballroom in Harlem.
- Held
- Were held
- The holdings
- To hold
Correct Answer

A. Held

Explanation

This sentence has a complete main clause The birth…can be traced… and an incomplete reduced adjective clause …at the Savoy Ballroom… This incomplete reduced adjective clause needs a reduced verb to be complete. Answer A is the best answer because it contains the reduced verb held. Answer B contains an unreduced verb, answer C contains a noun, and answer D contains an infinitive, so these answers are incorrect.

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46.

In the vessels of the vascular system of the giraffe _________ of valves that ensures a needed supply of blood to the head.
- Are series
- Is serious
- Is a series
- A series is
Correct Answer

A. Is a series

Explanation

This sentence begins with the place expressions In the vessels… of the giraffe. This sentence needs an inverted singular subject and verb following the introductory place expressions to be complete. Answer C is the best answer because it contains the inverted singular subject and verb is a series. Answer A contains an inverted plural subject and verb, answer B is missing a subject, and answer D contains a subject and a verb that are not inverted, so these answers are incorrect.

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47.

_____________________ such a challenging science is that all theory is based on observations that cannot be replicated in a controlled environment.
- It is astronomy
- Astronomy is
- What makes astronomy
- Why is astronomy
Correct Answer

A. What makes astronomy

Explanation

This sentence has a main verb is but needs a subject. A noun clause can be the subject of the verb is. A noun clause subject needs a connector, a subject, and a verb to be complete. Answer C is the best answer because it contains the connector/subject what and the verb makes. Answers A and B are each missing a connector, and answer D has an inverted subject and verb, so these answers are incorrect.

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48.

______________ global climate is warming has been well documented.
- There is the
- It is the
- The
- That the
Correct Answer

A. That the

Explanation

This sentence has an incomplete noun clause …global climate is warming… as the subject of the verb has been. The noun clause subject needs a connector to be complete. Answer D is the best answer because it contains the noun clause connector That. Answers A, B, and C are each missing a noun clause connector, so these answers are incorrect.

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49.

Some radioisotopes which ________________ as radioactive waste are now being used in experimental cancer therapies.
- Once discarded by scientists
- Scientists discarded
- To discard by scientists
- Were discarded scientists
Correct Answer

A. Scientists discarded

Explanation

This sentence has a main clause Some radioisotopes…are now being used… and an incomplete adjective clause which... The adjective clause needs a subject and a verb to be complete. Answer B is the best answer because it contains the subject scientists and the verb discarded. Answer A is missing the helping verb were, answer C contains an infinitive, and answer D is missing by after the passive verb, so these answers are incorrect.

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Jul 11, 2011

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Writing B2 - Skills Practice: Structure and Written Expression Writing B2 - Skills Practice: Structure and Written Expression

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STRUCTURE AND WRITTEN EXPRESSION STRUCTURE AND WRITTEN EXPRESSION

Writing B2 - Skills Practice: Written Expression

When ______________ chest pain, some doctors recommend that they take one full 325- milligram aspirin.

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There __________ called Epstein-Barr which leaves people feeling chronically fatigued and feeling as if they have a recurring case of the flu.

While ____________ those who are not working members of the press, press pins provide access to a press box for media members.

Skin color is determined by a chemical called melanin, _____________ in greater or lesser amounts.

For every disease-carrying toxin, there is an antitoxin which _________ out the effect of the toxin.

There ________ launched in 1958 that fell back to Earth and burned up in the atmosphere.

On October 28, 1886, the Statue of Liberty, a gift from the people of France, __________ in New York Harbor by President Cleveland.

Most adults, including 78 percent of men and 61 percent of women, __________ that gender roles in marriage today are more equal than traditional.

Although seismologists know __________, they are unable to predict with accuracy when or where a tremor might occur.

Galileo’s observations of the phases of Venus proved __________ formed the center of the planetary system.

Edmund Halley, who had discovered Halley’s comet in 1682, __________ before he could again see the comet whose return he had accurately predicted.

While ______________, Chu developed a way of trapping thousands of gas atoms using lasers.

_____________ famous civil rights leader, Martin Luther King, Jr. was named winner of the Nobel Peace Prize in 1964.

Should _________ help keeping their weight, blood pressure, pulse, and cholesterol down, swimming is an excellent activity.

While making the embarrassing mistake of wearing a scarlet garment instead of somber black, ___________, the atomic chemist and Quaker, discovered that he was color-blind.

_________________ New York and New Jersey, the George Washington Bridge opened to traffic in 1931.

Bees perform a complex dance ____________ other bees about the location of a good source of nectar.

While repositioning, cruise ships ___________ passengers for what is called a line voyage.

___________ floats or sinks is determined by its density rather than its weight.

The anteater has a long sticky tongue, ___________ capture ants and termites from their nests.

Scientists now know that the lack of an embryonic thumb in birds is why ____________ almost impossible for birds and dinosaurs to be related.

After ______ seven years to journey to Saturn, the spacecraft Cassini will spend four years exploring Saturn, its rings, and its icy moons.

Although _____________ their jobs, a majority of workers expect to move on to other jobs within five years of starting their current jobs.

Although applied for in October of 1793, Eli Whitney’s patent for his cotton gin ________ until March of the following year.

In the sand of the northern California coast ____________ San Agustin, which is said to be loaded with gold.

If introduced into avocado groves, the seed and stem weevils, seed moth, and fruit fly __________ the avocado industry in California.

The surgeon operating without delay on an inflamed appendix _______ a far more serious complication, which is the rupture of a germ-laden appendix.

Bank employees collect worn-out dollar bills, _____________ to a central office to be destroyed in a furnace.

The first mention of the cultivation of tea ___________ in a Chinese dictionary which dates about the year 350.

Lifestyle is more important __________ in a person’s lifespan.

Though racing toward the Milky Way galaxy at 300000 miles an hour, the Andromeda galaxy _________ with the Milky Way for about five billon years.

Unless _____________ as injury-free as possible, older athletes can have their activity and quality of life affected.

____________________ in the atmosphere is the temperature falling below freezing.

There has been a string of recent technology advances aimed t building new engines which are more clean and efficient than _____________.

Environmentalists are earnestly trying to determine _____________ of the ozone layer over the poles.

According to a recent survey, were _________ of telecommuters to lose their jobs, they would look for other telecommuting positions.

Only in the Civil War ___________ killed or wounded.

The blue-ringed octopus, _____________ found in tropical lagoons, is so venomous that it can paralyze or kill a person in matter of minutes.

Historical records ________________ were used in China for centuries before spreading to Europe.

In the halcyon days of the civil rights movement, a small group of dedicated lawyers, mostly black, ___________ carefully craft the strategy that led to the destruction of legal segregation.

_____________Lake Erie and the Hudson River, the Erie Canal opened in upstate New York in 1825.

In addition to quitting smoking and controlling blood pressure and diet, people need to think about how ______________ stress to avert potentially fatal heart problems.

Subduction is the process _________ the ocean floor recycles itself.

The abundant grain harvest of North America can be credited to Norman Borlag, a little-known scientist ___________ modern strains of high-yield wheat.

The birth of swing music can be traced to Battle of the Bands competitions ____________ at the Savoy Ballroom in Harlem.

In the vessels of the vascular system of the giraffe _________ of valves that ensures a needed supply of blood to the head.

_____________________ such a challenging science is that all theory is based on observations that cannot be replicated in a controlled environment.

______________ global climate is warming has been well documented.

Some radioisotopes which ________________ as radioactive waste are now being used in experimental cancer therapies.