Question

【题目】— Must I return the book tomorrow morning?
— No, you ______. You can keep it longer.
A.mustn't
B.can't
C.needn't
D.couldn't

Answer 1

【答案】C
【解析】句意：——我明天早上必须还书吗？——不，你不必。你可以保留的更久一些。mustn't必须不，一定不要，表示禁止。can't 不能；needn't 不必；couldn't不能。故选C。