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.

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

43.—Will you go to the museum tomorrow?

—Yes, I will go _______ it’s windy.

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

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

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.

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

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

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

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

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

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

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

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

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

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.

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

C. him running out D. his food run out