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    精英家教网 > 高中英语 > 题目详情
    We can’t go on with the experiment because the computer_________.
    A．hasn’t been repairedB．hasn’t repaired
    C．is not repairedD．hadn’t been repaired
    A
    A项用了现在完成时的被动语态，意思是计算机“还未被修好”。B选项中repair为及物动词，缺宾语，填上后句子不通；C选项为一般现在时的被动语态，它只表示并不是“修过的”；D选项时态不对。
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