| 51 Have you noticed her coat is wet? She must be caught in the rain.
A B C D
C 考察情态动词的用法，must have done sth表示对过去的一种肯定的判断
52 Teenagers always long for the time which they are able to be independent.
A B C D
B 考察定语从句引导词
53. Since the injury is bad, the doctors will operate him immediately.
A B C D