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

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

A

解析試題分析：句意：我的同學們打掃了我們的教室�？�！它非常干凈。clean發(fā)生在過去，對現(xiàn)在的影響是教室很干凈。所以句子用現(xiàn)在完成時態(tài)。故選A。
考點：考查現(xiàn)在完成時態(tài)。

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