-Look! Someone __________sofa.
-Well,it wasn`t me.I didn`t do it
A．is cleaningB．was cleaningC．has cleanedD．had cleaned
C

試題分析：考查時(shí)態(tài)。句意：—看有人已經(jīng)把沙發(fā)打掃干凈了�！皇俏�，我沒(méi)有做這件事情。根據(jù)句意說(shuō)明打掃沙發(fā)是已經(jīng)發(fā)生的事情，故使用現(xiàn)在完成時(shí)。故C正確。
點(diǎn)評(píng)：時(shí)態(tài)的考查要抓住題目的關(guān)鍵時(shí)間狀語(yǔ)，要根據(jù)上下文的語(yǔ)境來(lái)辨析。
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