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    精英家教网 > 高中英语 > 题目详情

    No conclusion _________ about the new product until the result of the experiment has been announced.

    A．is drawn B．was drawn C．will be drawn D．has been drawn

    C

    解析试题分析： 句意：直到实验结果被宣布才能得出关于新产品的结论。Until引导的是时间状语从句，用的是现在完成时，代替将来完成时，所以主语用一般将来时，选C。
    考点：考查时态

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