李明是你的好朋友，已经同学三年。他今年18岁，是一个个子不高，穿着朴素的学生。爱好音乐、体育，学习好，乐于助人。你从他身上学到许多东西。

请你根据以上提示，以“A Good Friend of Mine”为题，写一篇100-120词的短文，注意不要逐句翻译。

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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