TOEFL Mini-test (Skills 9-12)
Choose the letter of the word or group of words that best complements the sentence.
Questions and Answers
- 1.
Dolphins form extremely complicated allegiances and _______ continually change.
- A.
Enmities that
- B.
That are enmities
- C.
Enmities that are
- D.
That enmities
Correct Answer
A. Enmities thatExplanation
The sentence has a main subject and verb. Also, there is a connector "and" with one of two options. The first option is a noun; therefore, the needed option must also be a noun.
1. It is not (D) because it starts with a connector.
2. It is not (C) because it has a verb.
3. It is not (B) because it has a verb
4. It is (A)Rate this question:
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- 2.
Scientists are now beginning to conduct experiments on _______ trigger different sorts of health risks.
- A.
Noise pollution
- B.
That noise pollution
- C.
How noise pollution
- D.
How noise pollution can
Correct Answer
D. How noise pollution canExplanation
The sentence has a main subject and verb. The blank is after the preposition on. After the blank there is a verb in base form.
1. It is not (A) because noun would not match the sentence verb "trigger"
2. It is not (B) because it has a connector and the noun would not match the sentence verb "trigger"
3. It is not (C) because the noun would not match the sentence verb "trigger"
4. It is (D).Rate this question:
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- 3.
The Apollo 11 astronauts _______ of the Earth's inhabitants witnessed on the famous first moonwalk on July 20, 1969, were Neil Armstrong and Buzz Aldrin.
- A.
Whom
- B.
Whom millions
- C.
Were some
- D.
Whom some were
Correct Answer
B. Whom millionsExplanation
The sentence has a main subject and verb divided by several phrases describing the main subject. After the blank there is the preposition "of" which leads to believe that a noun should be part of the blank.
1. It is not (A) because a single connector is insufficient.
2. It is not (C) because it has a verb which is not needed.
3. It is not (D) because it has a verb and no noun.
4. It is (B).Rate this question:
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- 4.
At the end of the nineteenth century, Alfred Binet developed a test for measuring intelligence _______ served as the basis of modern IQ tests.
- A.
Has
- B.
It has
- C.
And
- D.
Which has
Correct Answer
D. Which hasExplanation
The sentence has a main subject and verb. After the blank there is a possible verb, meaning the blank must contain a connector and/or auxiliary.
1. It is not (A) because an auxiliary would not connector the sentence ideas.
2. It is not (B) because the pronoun is not needed.
3. It is not (C) because the sentence is not adding information.
4. It is (D).Rate this question:
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- 5.
_______ have at least four hours of hazardous materials response training is mandated by federal law.
- A.
All police officers
- B.
All police officers must
- C.
That all police officers
- D.
For all police officers
Correct Answer
C. That all police officersExplanation
There are two verbs in the sentence (have and is) and the BE verb should normally be considered as the main verb. Therefore, "have" is the second verb. On this idea, the blank should contain a connector and a subject.
1. It is not (A) because it has no connector.
2. It is not (B) because it has no connector.
3. It is not (D) because "for" is not a connector.
4. It is (C).Rate this question:
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- 6.
A cloud's reservoir of negative charge extends upward from the altitude at _______ the freezing point.
- A.
Temperatures hit
- B.
Hit temperatures
- C.
Which temperatures hit
- D.
Which hit temperatures
Correct Answer
C. Which temperatures hitExplanation
The sentence has a main subject and verb. The blank is after the preposition "at" and before a noun reference. The blank should contain a connector and possibly a verb.
1. It is not (A) because it has not connector.
2. It is not (B) because there is no connector and the verb-subject is inverted.
3. It is not (D) because the verb and subject are inverted.
4. It is (C).Rate this question:
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- 7.
In a 1988 advanced officers' training program, Sampson developed a plan to incorporate police in enforcing environmental protection laws whenever _______ feasible.
- A.
It is
- B.
Is
- C.
Has
- D.
It has
Correct Answer
A. It isExplanation
The sentence has a main subject and verb. The blank is after a connector and before an adjective which means there is a subject and verb missing.
1. It is not (D) because the verb doesn't match with the sentence adjective.
2. It is not (C) because it is only a verb and an incorrect one.
3. It is not (B) because a verb is insufficient.
4. It is (A).Rate this question:
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- 8.
_______ will be carried in the next space shuttle payload has not yet been announced to the public.
- A.
It
- B.
What
- C.
When
- D.
That
Correct Answer
B. WhatExplanation
The sentence has two verbs ("will be carried" and "has not yet been announced"). The present perfect verb should be considered as the main verb and the future one as the secondary. This means there is a connector missing.
1. It is not (A) because it is not a connector.
2. It is not (C) because the connector refers to a time which is not congruent with the sentence idea.
3. It is not (D) because the connector serves as a pointer and would be illogical to the sentence idea.
4. It is (B).Rate this question:
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- 9.
During free fall, _______ up to a full minute, a skydiver will fall at a constant speed of 120 m.p.h.
- A.
It is
- B.
Which is
- C.
Being
- D.
Is
Correct Answer
B. Which isExplanation
The main subject and verb are after the second comma. This means that within the commas there is a complimentary sentence or extra information.
1. It is not (A) because a subject reference is not needed for a complimentary phrase.
2. It is not (C) because a connector omission is not required.
3. It is not (D) because a linking verb is not needed.
4. It is not (B).Rate this question:
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- 10.
The fact _______ the most important ratings period is about to begin has caused all the networks to shore up their schedules.
- A.
Is that
- B.
Of
- C.
That
- D.
What
Correct Answer
C. ThatExplanation
The sentence has a main subject and verb. The blank is after the main subject. This means the blank should have a connector.
1. It is not (A) because it has a verb.
2. It is not (B) because it is not a connector.
3. It is not (D) because the connector is illogical to the sentence idea.
4. It is (C).Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Apr 27, 2012Quiz Created by
Eduardocarrillo