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    精英家教网 > 初中英语 > 题目详情

    Mary ____do her homework first when she gets home.

    A．is B．have to
    C．has to D．are

    C

    解析试题分析：句意：玛丽到家后得先做作业。Have to必须，不得不，后跟原形动词，当主语为三单时要变为has to。所以选C。
    考点：考查情态动词。

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