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

　　A. I B. me C. us D. ours

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

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

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　　43.—Will you go to the museum tomorrow? copyright kaixin100

　　—Yes, I will go _______ it’s windy.

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　　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, ______? Kaixin100网络，Kaixin100

　　A. didn’t she B. usedn’t she C. does she D. Both A& B.

　　45. It is very kind ______ you to supply us _______ so much information. copyright kaixin100

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

　　46. Five minutes earlier, _______ we could have caught the last train. copyright kaixin100

　　A. of B. but C. and D. so copyright kaixin100

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

　　A. have seen B. has seen C. has been seeing D. had seen

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　　48. I regretted _______ the days when I _______ hard at school.

　　A. wasting…must have worked B. having wasted…should have worked kaixin100.cn

　　C. to waste…could work D. to have wasted…would work Kaixin100内容管理系统

　　49. He’s sure you’ll pass the examination, _______? kaixin100.cn

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

　　50. With ______, the man had to go out of his hiding place. 本文来自Kaixin100

　　A. his food ran out B. his food running out copyright kaixin100

　　C. him running out D. his food run out