Question

【题目】— Must I return the book this week?
— No, you ______. You can ______ it for 20 days.
A.mustn't; keep
B.needn't; borrow
C.needn't; keep

Answer 1

【答案】C
【解析】句意：——我这个周必须还书吗？——不，你不必，你可以保留20天。must必须，用于疑问句时，肯定回答是yes，you must；否定回答是no，you needn't。keep保留，表示持续的动作；borrow借，是短暂性动词，不表持续。故选C。