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    My son the examination, but he wasn't careful enough. A. might be able to pass B. must have passed C. could have passed D. were able to pass 【查看更多】

     

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    My son ________ the examination, but he wasn't careful enough．

    [　　]
    A．

    might be able to pass

    B．

    must have passed

    C．

    could have passed

    D．

    were able to pass

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