31. As teachers we should concern ourselves with what is said, not what we think ______.

　　A. ought to be said B. must say C. have to be said D. need to say

　　32. You ______ all those calculations. We have a computer to do that sort of thing.

　　A. must not have done B. should not have C. can not have done D. needn’t have done

　　33. With all this work on hand, he ______ to the cinema last night.

　　A. mustn’t go B. wouldn’t go C. oughtn’t go D. shouldn’t have gone

　　34. “I saw Mary in the library yesterday.” “You _______her, she is still in hospital.”

　　A. mustn’t have seen B. could not see　　 C. can’t have seen D. must not see

　　35. He regretted ______ the decision so hastily.

　　A. make B. making C. to make D. have made

　　36. The speech which he made ______ the project has bothered me greatly.

　　A. being concerned B. concerning C. be concerned D. concerned

　　37. --- “ Joe doesn’t seem like the same person.”

　　---“______so much in the war has made him more thoughtful.”

　　A. To have seen B. Having seen C. His seeing D. For him to see

　　38. He had no choice but ______ to see him.

　　A. to go B. went C. going D. go

　　39. Although young, Fred could resist ______ what to do and what not to do.

　　A. to be told B. having been told C. to have been told D. being told

　　40. No matter how frequently ______, the works of Beethoven always attract a large audience.

　　A. performing B. performed C. to be performed D. being performed

　　41. The music was so ______ that the audience were ______ to death.

　　A. boring .. bored B. bored … boring C. bored …bored D. boring … boring

　　42. When he came back after an absence of 20 years, he found his hometown completely ______.

　　A. changing B. to be changed C. to change D. changed

　　43. Some of the experiments ______ in the book are easy to perform.

　　A. being described B. described C. to be described D. having been described

　　44. I really appreciate ______ to help me, but I am sure that I can manage by myself.

　　A. you to offer B. that you offer C. your offering D. that you are offering

　　45. He should get used by now ______ Chinese food.

　　A. to eating B. to eat C. for eating D. eating