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My classmates _____ our classroom. Look! It’s very clean.

A.have cleaned B.will clean
C.is cleaning D.cleaned

A

解析试题分析:句意:我的同学们打扫了我们的教室。看!它非常干净。clean发生在过去,对现在的影响是教室很干净。所以句子用现在完成时态。故选A。
考点:考查现在完成时态。

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