--Look! Somebody       the sofa.
--Well, it wasn’t me. I didn’t do it.
A．is cleaningB．was cleaningC．has cleanedD．had cleaned
C
句意為：“瞧，有人弄干凈了沙發(fā)�！薄班�，那不是我。反正我沒做�！备鶕�(jù)回答，可知clean動作發(fā)生在過去。且該過去的動作對現(xiàn)在造成的影響是沙發(fā)干凈了。所以用現(xiàn)在完成時態(tài)。
【考點定位】現(xiàn)在進行時表“此時此刻或現(xiàn)階段”正發(fā)生的動作或狀態(tài)。動作還沒有完成�，F(xiàn)在完成時通常表示動作在過去已完成。當然現(xiàn)在完成時還可表將來。
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