四、词汇检测(共10小题，每小题1分，满分10分)
根据下列句子及所给汉语注释或通过上下文，写出空缺处各单词的正确形式。每空只写一词。
38. He's very excited about the (可能)of winning the match.
39. This is probably the (丑陋的)painting I've ever seen.
40. The sports meeting was (取消)because of the bad weather last Friday.
41. He has donated (九分之五)of his money to people in need.
42. This violin is one of the (演员). She's looking for it everywhere.
43. The professor made a contribution to (培养)his stu