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    精英家教网 > 高中英语 > 题目详情
    Not until his mother came back_______.
    A．he began to do his homeworkB．had he began to do his homework
    C．he had begun to do his homeworkD．did he begin to do his homework
    D

    试题分析：考查倒装句：not until放在句首的时候，主句用部分倒装，答案在BD里面选择，句意：直到他妈妈回来，他才开始做作业。可知是妈妈回来后，他做作业，不是过去的过去的动作。选D。
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