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    精英家教网 > 高中英语 > 题目详情

    By the time you finish the book, you _______________ more about Chinese history.
    A．will learnB．have learntC．will have learntD．are learning
    C

    试题分析：考查时态。By与完成时连用。当by后面是过去的时间，使用过去完成时；当by后面是现在的时间，使用现在完成时，当by后面是将来的时间的时候，使用将来完成时。本题By后面的时间状语从句the time you finish the book用一般现在时代替将来时，所以主句使用将来完成时。故C正确。
    点评：By与完成时连用。当by后面是过去的时间，使用过去完成时；当by后面是现在的时间，使用现在完成时，当by后面是将来的时间的时候，使用将来完成时。
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