Question

Thomas, please be quiet. The others ________ hear very well.

1. A.
   can't
2. B.
   mustn't
3. C.
   shouldn't
4. D.
   needn't

Answer 1

A
考查情态动词表示推测。前者说“Thomas，请安静。”后者由此作出非常肯定的推断“别人一定听不清”。四个情态动词中：在表示推测“一定不能”时不用mustn't，而用can't“一定不……”。shouldn't“不应该”；needn't“不需要”，C、D意思不符，可排除。故选A。本题较难。