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    the floor, I found his pen lying on the ground. A. While sweeping B. While swept C. If sweeping D. If swept 【查看更多】

     

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    _________ the floor, I found his pen lying on the ground.

    A．While sweeping

    B．While swept

    C．If sweeping

    D．If swept

     

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    ____ the floor, I found his pen lying on the ground.

    　　 A. While sweeping　 B. While swept　

    　　 C. If sweeping　 　　　 D. If swept

     

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    ________ the floor, I found his pen lying on the ground．

    [　　]

    A．While sweeping

    B．While swept

    C．If sweeping

    D．If swept

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