Question

【题目】You____ return the book now. You can keep it next week if you like.

A. must B. mustn't C. needn't D. have to

Answer 1

【答案】C

【解析】句意：你现在不必还书。如果你愿意的话，可以留到下星期。A. must“必须”； B. mustn't“一定不要”，表示绝对禁止；C. needn't“不需要”；D. have to“必须，不得不”。结合句意可知用needn't 表示不需要。故选C。