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回答與延續性動詞的用法。Must開頭的一般疑問句的否定回答用“……needn’t”, 由答語for短語指一段時間，故用延續性動詞，borrow為短暫性動詞，要換成延續性動詞keep。