题目内容

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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