Question

【题目】— Must I finish the homework right now, Mum?
— No, you_______. But you must finish it before.
A.mustn't
B.may not
C.needn't
D.can't

Answer 1

【答案】C
【解析】句意：－妈妈，我现在必须完成作业吗？－不，你不必。但是你必须在晚上九点前完成。A. mustn't不准，不允许，禁止；B. may not不可以；C. needn't不必；D. can't不能。故选C。