五、词汇检测 (共10小题；每小题1分，满分10分) 

A) 根据首字母或汉语注释，在答题卷标有题号的横线上，写出空缺处各单词的正确形式。每空只写一词。

49. My brother is celebrating his   ▲   (第九) birthday.

50. Helen couldn’t get out of the car because she   ▲   (使受伤) her leg.

51. Ricky was   ▲   (激动的) to hear from Mary.

52. She is ill, so she feels very w  ▲   and can’t stand up.

53. It is said that the world will change a lot during the next two c  ▲  .