41. He was last seen in public on the __________ of his daughter's wedding.

A. chance B. occasion C. event D. affair

42. Please keep an eye on my luggage, and I'll be back __________

A. in time B. in no time C. at one time D. at a time

43. Such a skilled tennis player knows how to take __________of his opponent's (对手) chief weakness.

A. use B. advantage C. utility D. chance

44. It is impossible to live in society and be independent __________ society.

A. on B. from C. in D. of

45. She scarcely cares for anything, __________?

A. doesn't she B. does she C. is she D. isn't she

46. There is an old saying which goes, "Never __________until tomorrow what you can do today. "

A. put aside B. put up C. put off D. put away

47. His car broke down when he was only __________ home.

A. a half way B. halfway C. half a way D. halfway to

48. The patient's progress was very encouraging as he could __________ get out of bed without help.

A. nearly B. only C. merely D. barely

49. He has __________ the army for ten years and is now an officer.

A. gone into B. joined in C. been in D. ***e into

50. He has made another wonderful discovery, __________ of great importance to science.

A. which I think it is B. of which I think it is

C. I think which is D. which I think is

答案：

41-45 BBBDB 46-50 CBACD