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    We must keep the classroom . A. clean B. to clean C. cleaning D. cleaned 【查看更多】

     

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    We must keep the classroom ___________.

    A．clean

    B．to clean

    C．cleaning

    D．cleaned

     

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    We must keep the classroom _________．

    [　　]

    A．clean

    B．to clean

    C．cleaning

    D．cleaned

    查看答案和解析>>


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