1. _____ a necessary dimension for measuring astronomical space and the distance of heavenly bodies from the Earth.
(A) Once in time
(B) Time is
(C) The time
(D) It is time
B
 
2. Jackie Joyner-Kersee, _____ the world record in the heptathlon in the 1988 Olympics, also won the long jump in the year.
(A) whose setting
(B) which she set
(C) whoever set
(D) who set
D
 
3. The fossilized remains of a type of camel _____ a dog have been found in the Bad Lands of South Dakota。.
(A) no more large
(B) no larger than
(C) not larger
(D) which no larger
B
 
4. Gorillas are quiet animals, _____ they are capable of making about 20 different sounds.
(A) whether
(B) which
(C) even though
(D) as well as
C
 
翻译参考：大猩猩是很安静的动物，尽管他们可以发出20种不同的声音。
 
5. Although the Earth`s chemical composition had been studied for years, only toward the end of the nineteenth century _____ as a discipline in its own right.
(A) when geochemistry was recognized
(B) was geochemistry as recognized
(C) then recognized as geochemistry
(D) as geochemistry was recognized
B
 
6. Because the wood of the dogwood tree is very hard, _____ is used for objects, such as roller skate wheels, in which hardness is desired.
(A) and
(B) it
(C) what
(D) thus
B
 
7. In hot, dry regions, the Sun`s heat causes the outer layer of rocks _____, a process called exfoliation.
(A) are expanded and peeled away
(B) to expand and peel away
(C) expands and peels away
(D) they expand and peel away
B
 
8. The lower _____ in a room, the more slowly our eyes focus.
(A) the level of lighting
(B) light level
(C) leveling of light
(D) lighting is level
A
 
9. _____ Sarah Orne Jewett, a nineteenth-century writer, read widely in her family`s extensive library.
(A) That she received little education formally
(B) The little formal education that she received
(C) Little formal education that was received by
(D) Although she received little formal education
D
 
10. (A) In the early twentieth century, the "Model T" automobile was mass-produced and sold at a price _____ could afford.
(A) the average person who
(B) that the average person who
(C) and the average person
(D) the average person
D
 
11. Not only _____ all the positive charge of an atom, it is also the site of the weight of every atom.
(A) does the nucleus hold
(B) the nucleus holding
(C) the nucleus does hold
(D) holds the nucleus
A
 
12. The wind-rippled sand at California`s Kelso Dunes resembles _____.
(A) to be an ocean floor
(B) as an ocean floor
(C) an ocean floor
(D)   being an ocean floor
C
 
13. Fossil records indicate _____ existing in the past have become extinct.
(A) that many species of organisms
(B) many species of organisms that
(C) many species of organisms are
(D) there are many organisms
A
 
14. Experiments related to the sense of smell are more easily _____ than those related to perception of color.
(A) setting them up
(B) to set up
(C) set up
(D) sets up those
C
 
15. The Pulitzer Prize has been _____ in American literature for more than seventy years.
(A) the award most prestigious that
(B) the most prestigious award
(C) a prestigious award that most
(D) most prestigious award
B
 
16. Those interested in covered bridges can find six of they between Keene and
A B C D
Winchester, New Hampshire.
D
they → them
 
17. The Sun`s energy is generated deep in the solar core by the synthesis of