--- May I go swimming now? --- No, you _...

--- May I go swimming now?

--- No, you ______. You must finish your homework first.

A. mustn’t B. may not

C. couldn’t D. needn’t

A 【解析】试题分析：句意：——我现在可以去游泳吗？——不，你一定不要去。你必须首先完成家庭作业。A. mustn’t一定不要；B. may not可能不；C. couldn’t不能；D. needn’t不必。May I…?否定回答用mustn’t，故选A。考点：考查情态动词辨析。

考点分析：

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