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    精英家教网 > 高中英语 > 题目详情

    -------- The window is dirty.
    --------- I know. It __________ for weeks.
    A．hasn’t cleaned B．didn’t clean
    C．wasn’t cleaned D．hasn’t been cleaned
    D

    试题分析：考查时态和语态。现在完成时可以表示过去发生的事情对现在的影响，也可以表示过去发生的事情持续到现在。句意：—窗户很脏。—我知道，这些窗户已经很几个星期没有被擦了。指过去没有擦窗户的事情对现在的影响就是窗户很脏。故D正确。
    点评：现在完成时可以表示过去发生的事情对现在的影响，也可以表示过去发生的事情持续到现在。
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