1.
…………..not a single hard-surfaced road during the entire colonial period aside from the city.
A. 
B. 
C. 
D. 
2.
. …………..in 1776 that Declaration of Independence was signed.
A. 
B. 
C. 
D. 
3.
…………..more than 300,000 people in Philadelphia by the end of the colonial period, making it the largest city in the colonies.
A. 
B. 
C. 
D. 
4.
In the 18th century, ………….. not many women who had access to formal
education in the colonies.
A. 
B. 
C. 
D. 
5.
After the Revolution, although some advances were made in education, …………..a slow process.
A. 
B. 
C. 
D. 
6.
…………..in fluorescent lamps, television tubes, and other devices.
A. 
B. 
C. 
D. 
7.
The tips of some undersea mountains …………..islands in the middle of the ocean.
A. 
B. 
C. 
D. 
8.
…………..of fish; jawless fish, cartilaginous fish, and bony fish.
A. 
B. 
C. 
D. 
9.
…………..to stop yourself from blinking except for a short period of time.
A. 
B. 
C. 
D. 
10.
…………..today was developed by Swiss scientist Horace de Sassure around 1773.
A. 
Mountaineering it as we know
B. 
Mountaineering as we know it
C. 
We know mountaineering it
D. 
We know there is mountaineering
11.
. …………..of the surface of the Earth is covered by water.
A. 
B. 
There is nearly three-quarter
C. 
It is nearly three-quarters
D. 
12.
By the mid-eighteenth century………….. so many new immigrants entering North America from Europe that the original colonies in the Northeast were overcrowded.
A. 
B. 
C. 
D. 
13.
…………..not until the end of the seventeenth century that scientists began to stress the importance of experiments as a way of gaining knowledge.
A. 
B. 
C. 
D. 
14.
………..are the most poisonous fish in the world.
A. 
B. 
C. 
D. 
15.
Seismic prospecting…………..used to map out rock structures below the ground.
A. 
B. 
C. 
D. 
16.
………..in space, a rocket has to be powerful enough to break out of the pull of
the Earth’s gravity.
A. 
B. 
C. 
D. 
17.
When archeologist discovered the ruins of the Olympic Stadium, interest in the Games …………
A. 
B. 
C. 
D. 
18.
The ancient Olympic Games …………as amateur contests, but in time became
professional.
A. 
B. 
C. 
D. 
19.
The winners received a wreath …………from the branches of the sacred olive tree.
A. 
B. 
C. 
D. 
20.
The marathon first staged in 1896, …………the legendary feat of a Greek soldier who carried news of victory from the battlefield at Marathon to Athens.
A. 
B. 
C. 
D. 
21.
Winning first place in an event was the only glory in the ancient Games because second and third places………….
A. 
B. 
C. 
D. 
22.
After more than 1500 years, Athens …………for the site of the first modern Olympics.
A. 
B. 
C. 
D. 
23.
The Olympic Games are held every four years in a selected country, and…………to athletes of all nations.
A. 
B. 
C. 
D. 
24.
Electronic timing …………..for the first time in the 1912 Olympics in Sweden.
A. 
B. 
C. 
D. 
25.
The first systematic chart ever made of an ocean current …………..by Benjamin Franklin.
A. 
B. 
C. 
D. 
26.
Petroleum …………..on every continent and beneath every ocean.
A. 
B. 
C. 
D. 
27.
Animals …………..on Earth for at least 700 million years.
A. 
B. 
C. 
D. 
28.
Some fish …………..distortion of electrical field through special receptors.
A. 
B. 
C. 
D. 
29.
During the Ice Age, glaciers…………..and retreated several times over large
areas of the earth.
A. 
B. 
C. 
D. 
30.
The authorities permitted women __________ in track and field events in the 1928 Winter Games.
A. 
B. 
C. 
D.