Question

---Must I return the magazine to you right now, Sandy?

---No, you ______ You may keep it until next Wednesday.

1. A.
   needn't
2. B.
   can't
3. C.
   must
4. D.
   may

Answer 1

A
考查情态动词。回答是否定回答，这样就排除C、D项，must的否定回答应该是needn't，故选A。B项can't在表示推测时出现在否定句和疑问句中代替mustn't。本题难度适中。