50. This is the reason ________ at the meeting for his carelessness in his work.

A. he explained　　　　　　　　　　　　　　　　　　 B. what he explained

C. how he explained　　　　　　　　　　　　　　　 D. why he explained

49. The boy pointed to the direction ________ he would run.

A. in which　　　　 　　 B. to which　　　　 C. that　　　　　　　　 　 D. which

48. She decided to write about Chaplin, one of ______ films she had seen years before.

A. whose　　　　　　　　　　 B. whom　　　　　　 C. which　　　 　　　 D. that

47. The poor man, ________ lost his money just now, is called John.

A. that　　　　 　　　 B. which　　　　　　　 C. who　　　　 　　　 D. whom

46. ________ is known to all, China will be an ________ and powerful country in 20 or 30 years’ time.

A. That; advancing　　　　　　　　　　　　　　　　 B. It; advanced　　　　　

　　　 C. As; advancing　　　　　　　　　　　　　　　　　　 D. As; advanced　　　

45. All through his life Abraham Lincoln fought _____ an end of slavery(奴隶制度).

A. against　　　　　　　　　 B. for　　　　　　　　　 C. with　　　　 　　　 D. up

44. You made the same mistake for ________ second time, dropping ________ “n” in the word government.

A. a; the　　　　　　　　　　 　 B. a; an　　　　　　　　 C. the; an　　　　　　　　　　 D. a; a

43. During the working hours all the doctors and nurses had to ________ masks and close-fitting white caps because SARS was going around.

A. wear　　　　　　　　　　　　　　 B. put on　　　　　　 C. dress　　　　　　　　　　　 D. be dressed in

42. You should be playing ________ working indoors; you need some exercise.

A. and 　　　　　　　　　　　　　　 B. or 　　　　　　　　　 C. instead of 　　　　　　 D. in order to