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    精英家教网 > 初中英语 > 题目详情
    People _________ rivers for transportation since the beginning of history.
    A．usedB．have usedC．useD．had used
    B

    试题分析：句意：自从历史之初人们就用河水来作为交通工具，根据句意和since引导的从句可知用完成时，现在完成时的构成have done的结构。结合语境故选B
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