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Look! The students _____ the classroom.

A. clean B. are cleaning

C. are cleanD. cleaning

 

B

【解析】

试题分析:句意:看!这些学生们正在打扫教室。分析:考查现在进行时的用法,构成:be doing,主语是第三人称复数,因此be 动词用are.故选 B

考点:考查动词的用法。

 

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