-The window is dirty.
-I know. It ___________ for weeks.
A．hasn’t cleanedB．didn’t cleanC．wasn’t cleanedD．hasn’t been cleaned
D

試題分析：句意：--窗戶很臟。---我知道。它有數(shù)周沒(méi)被清潔了。這里強(qiáng)調(diào)沒(méi)有被清洗已經(jīng)持續(xù)了幾周，可能還要進(jìn)行下去，符合現(xiàn)在完成進(jìn)行時(shí)的用法，而且the windows和clean是被動(dòng)關(guān)系，選D。
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