- Look! Somebody_______ the sofa.
-Well, it wasn't me. I didn't do it.
A．is cleaningB．was cleaningC．has cleanedD．cleans
C

試題分析：句意：看！有人打掃了沙發(fā)。恩，不是我，我沒有打掃。根據(jù)句意，表示已經(jīng)打掃了，用現(xiàn)在完成時表示對現(xiàn)在造成的影響，故選C
點評：現(xiàn)在完成時表示動作已經(jīng)完成，并對現(xiàn)在造成了影響。初中階段注意兩個詞所連的時間狀語，即for后面加一段時間；since后面加點時間，有這兩個短語在句子中時，句子都需要用現(xiàn)在完成時。
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