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【题目】 ---Who is making much noise?

---It ____ be Timmy. He is sleeping now.

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

【答案】A

【解析】

试题分析:句意-谁在制造噪音?-不可能是Timmy,他现在在睡觉。can’t不可能;may not 可能不;mustn’t禁止,不要;couldn’t可能不。根据句意可知选A。

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