一、单项选择。
1. The police______making inquires about the accident.
A. is
B. are
2. The cattle______grazing in the meadows.
A. is
B. are
3. One thousand pounds______a small sum to run a factory.
A. is
B. are
4. The singer and dancer______attend our evening party.
A.is to
B.are to
5. The public______requested not to leave cigarette ends in the woods.
A. is
B. are
6. The police______the prisoner’s statements by questioning several witnesses.
A.are verifying
B.is verifying
C.are verified
D.is verified
7. She says more than one______dismissed from this company.
A.have been
B.are
C.has been
D.had been
8. More than half of those committing murder and violent assaults______alcohol immediately before the crime.
A. have been consumed
B. have consumed
C. has been consumed
D. has consumed
9. In the last few years, intensive design and development effort______to the introduction of electronic exchanges.
A.have been applied
B.has been applied
C.is being applied
D.would be applied
10. The greater part of the lower grade students in our university______to achieve the norm on the reading tests.
A.was unable
B.was to be unable
C.were unable
D.being unable
11. She as well as the other students______how to install this electric equipment.
A.has learned
B.are learning
C.have learned
D.are to learn
12. Beef cattle______of all livestock for economic growth in certain geographic regions.
A. the most are important
B. are the most important
C. is the most important
D.that are most important
13. ______in the desert is mainly due to the limited supply of water.
A. Plants are widely spaced
B. The spacing of plants is wide
C. Plants to be spaced widely
D. The wide spacing of plants
14. Most electronic devices of this kind, ______manufactured for such purposes, are tightly packed.
A.that are
B.as are
C.which is
D.what are
15. Neither of the young men who had applied for a position in the university______.
A.has been accepted
B.have been accepted
C.was accepted
D.were accepted
16. The growth of part-time and flexible working patterns, and of training and retraining schemes, ______more women to take advantage of employment opportunities.
A.have allowed
B.allow
C.allowing
D.allows
17. How close parents are to their children______a strong influence on the character of the children.
A.have
B.has
C.having
D.to have
18. Here is a message of importance to every man and woman who______.
A.votes
B.vote
C.voting
D.are voting
19. The basketball team______baths now.
A.has
B.have
C.is having
D.are having
20. Statistics______one of the subjects that I study.
A.are
B.is
C.were
D.was
21. ______already been interviewed.
A. A number of applicants have
B. A number of applicants has
C. The number of applicants have
D. The number of applicants has
22. There______telephone calls today.
A.has been a number of
B.have been a number of
C. has been the number of
D. have been the number of
23. The number of doctors in our country______greatly increased since liberation.
A.has
B.have
C. are
D. is
二、改错。
24. One of the most difficult questions（A） in defining（B） sleep is（C） “what is（D） the functions of sleep?”
25. It is（A） the interaction（B） between people, rather than the events that occur in their lives, that are（C） the main focus of social（D） psychology.
26. One of the wildest（A） and most inaccessible（B） parts of the United States are（C） the Everglades where wildlife is abundant and largely（D） protected.
27. Despite（A） much research, there are still certain elements in（B） the life cycle of the insect that is（C） not fully understood（D）.
28. The tapir（貘）, an odd-toed, hoofed mammal, feed（A） on plants, eating（B） such things as grass, leaves, fallen（C） fruit, and moss in large（D） quantities.
29. The weeds（A） and tall grass in that yard makes（B） the house look（C） as if it had been（D） vacant for quite some time.
30. Just outside（A） the ruins are（B） a magnificent（C） building surrounded（D） by tall trees.
31. The amount of pressure（A） which（B） the materials are subject（C） to affect（D） the quality of the products.
32. Nearly（A） 75 percent of（B） the land of the（C） Canadian province of British Columbia are（D） covered by forests.
33. Australian koalas are furry, gray animal（A） that live（B） in trees（C） and feed on（D） leaves.
34. Pollen can be（A） transferred by the wind or by birds that comes（B） into contact（C） with（D） flowers.
35. Usually an atom having（A） one, two, or three electrons in its（B） valence band readily contributes electrons to and receive（C） electrons from neighboring（D） atoms.
36. The wingspread of various（A） species of bats range（B） from over（C） five feet to（D） less than two inches.
37. The hind leg（A） of the gerbil are particularly（B） well adapted to leaping（C） across（D） its desert habitat.
38. A change in direction of the monsoon winds result（A） from the differences（B） between the heating or cooling（C） of landmasses and that of oceans（D）.
39. In some areas（A） of the United States, unfavorable climate or（B） soil make farming（C） an impossible（D） task.
40. The structure or（A） behavior of many（B） protozoans are amazingly（C） complex for single-celled animals（D）.
41. Intelligence（A）, education, and（B） experience all helps（C） shape management（D） style.
42. There are many valuable services（） which the public are willing to pay for（）, but which does not bring（） a return in money（） to the community.
43. Beneath（A） the deep oceans that cover（B） two-thirds of the Earth, intriguing secret（C） of the planet are concealed（D）.
44. The early periods of aviation（A） in the United States was marked by exhibition（B） flights made by individual fliers（C） or by teams of performers（D） at country fairs.
45. Alaska’s vast areas of untamed（A） wilderness（B） attracts（C） many people who enjoy（D） the outdoors.