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Look! The students _____ the classroom.

A. clean B. are cleaning

C. are cleanD. cleaning

 

B

【解析】

試題分析:句意:看!這些學生們正在打掃教室。分析:考查現在進行時的用法,構成:be doing,主語是第三人稱復數,因此be 動詞用are.故選 B

考點:考查動詞的用法。

 

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