Question

—  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

D．mustn't; borrow

Answer 1

C

must回答与延续性动词的用法。Must开头的一般疑问句的否定回答用“……needn’t”, 由答语for短语指一段时间，故用延续性动词，borrow为短暂性动词，要换成延续性动词keep。