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    9．You open the door before the train gets into the station. A. don't have to B. mustn't C. needn't D. may not 【查看更多】

     

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    You ________ open the door before the train gets into the station.

    A. don't have to

    B. needn't

    C. may not

    D. mustn't

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    You ________ open the door before the train gets into the station.

    A. don't have to

    B. needn't

    C. may not

    D. mustn't

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    You ________ open the door before the train gets into the station．


    1. A.
      don't have to
    2. B.
      mustn't
    3. C.
      needn't
    4. D.
      may not

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    You ________ open the door before the train gets into the station.

    [　　]

    A．don't have to
    B．mustn't
    C．needn't
    D．may not

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