Question

【题目】—Must I clean my room this evening, Mum?

—No, you _________clean it today. You can do it tomorrow.

A.mustn'tB.needn'tC.can'tD.shouldn't

Answer 1

【答案】B

【解析】

句意：—妈妈，今天晚上我必须打扫房间吗？ —不，你今天不必打扫。你可以明天做。
考查must表必须的否定回答。mustn't一定不要，禁止；needn't没必要；can't不能；shouldn't不应该。根据文中的句子you can do it tomorrow.可知今天不比打扫。needn't（没必要）符合题意。故选B。