31. They did not discover until later _____ the car had been destroyed.
A. as B. than
C. which D. that
32. They overcame all the difficulties and fulfilled the plan ten days ahead of schedule, _____ was something we had not expected.
A. that B. this
C. it D. which
33. That’s the reason _____ Ann could not do her part of the job.
A. that B. of
C. because D. why
34. The company official _____ I thought would be fired received a raise.
A. whom B. whoever
C. who D. of whom
35. In 1990 he caught a serious illness from _____ effects he still suffers.
A. that B. which
C. what D. whose
36. His brother had become a teacher, _____ he wanted to be.
A. who B. what
C. which D. that
37. _____ I saw was two men crossing the street.
A. What B. Whom
C. Who D. That
38. The time will come _____ man can fly to outer space freely.
A. that B. when
C. in that D. what
39. Before her marriage, she spent a considerable time in that very part of Shanghai,_____ she belonged.
A. which B. to where
C. to which D. at which
40. The United States is composed of fifty states, two of _____ are separated from the others by land or water.
A. them B. that
C. which D. those
41. Crude oil is refined in a refinery, _____ makes it possible to get many grades of oils for different uses.
A. as B. that
C. this D. which
42. I am sure that _____ you said is wrong.
A. which B. all
C. this D. how
43. He arrived late for the tea party, _____ made us all very disappointed.
A. which B. this
C. it D. that
44. The people at the party were worried about John because no one was aware _____ he had gone.
A. where that B. where
C. of the place where D. the place
45. Is there anyone you can think of _____ may know her address?
A. which B. that
C. who D. what
46. It was raining, _____ was a pity.
A. what B. that
C. as D. which
47. This is the reason _____ an aeroplane can’t fly in space.
A. which B. why
C. where D. for that
48. We’ve tested three hundred types of boot, _____ completely waterproof.
A. no of which B. none of which
C. some of that D. neither of which
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