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【题目】Could you please clean your room?

Sorry, I .I have to do my homework.

A. can’t B. couldn’t C. mustn’t D. may not

【答案】A

【解析】

试题分析:句意:-请你能打扫你的房间,好吗? -很抱歉,我不能,我得做我的家庭作业。can’t 不能,不会;couldn’t不能,是过去时态;mustn’t 禁止,不允许,may not不可以。Could you please句型中的could只表示委婉语气,不表过去时态。所以选A。

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