41. It was _______ who helped Tom out when he was in trouble.

　　A. I B. me C. us D. ours

　　42. The leaves of many trees turn ______ in autumn. kaixin100.cn

　　A. to red D. red C. to be red D. into red

　　43.—Will you go to the museum tomorrow?

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　　—Yes, I will go _______ it’s windy. Kaixin100网络，Kaixin100

　　A. since B. as though C. if D. even though

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　　44. Mary used to stay up until far into the night, ______?

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　　A. didn’t she B. usedn’t she C. does she D. Both A& B. 内容来自kaixin100

　　45. It is very kind ______ you to supply us _______ so much information.

　　A. for…with B. for…in C. of…with D. of…in

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　　46. Five minutes earlier, _______ we could have caught the last train.

　　A. of B. but C. and D. so

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　　47. Many a boy and many a girl _______ it since then. kaixin100.cn

　　A. have seen B. has seen C. has been seeing D. had seen 内容来自kaixin100

　　48. I regretted _______ the days when I _______ hard at school. Kaixin100内容管理系统

　　A. wasting…must have worked B. having wasted…should have worked 内容来自kaixin100

　　C. to waste…could work D. to have wasted…would work copyright kaixin100

　　49. He’s sure you’ll pass the examination, _______?

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　　A. isn’t he B. do you C. won’t you D. hasn’t he

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　　50. With ______, the man had to go out of his hiding place. Kaixin100内容管理系统

　　A. his food ran out B. his food running out

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　　C. him running out D. his food run out

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