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    John his promise. I wonder why he changed his idea. A. need keep B. should have kept C. must have kept D. will keep 【查看更多】

     

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    John ________ his promise．I wonder why he changed his idea．

    [　　]
    A．

    need keep

    B．

    should have kept

    C．

    must have kept

    D．

    will keep

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