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    16．-Why hasn' t Jack come back yet? anything have happened to him? -I'm not sure, but I guess someyhing . A．May; must have B．Can; may have C．Must; may D．should; might have 【查看更多】

     

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    －Why hasn' t Jack come back yet?________ anything have happened to him?

    －I'm not sure, but I guess someyhing ________．

    [　　]
    A．

    May; must have

    B．

    Can; may have

    C．

    Must; may

    D．

    should; might have

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