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    The boy was seen on the sports ground. A. to play B. play C. to playing 【查看更多】

     

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    The boy was seen            on the sports ground.

    A. to play           B. play              C. played          D. to playing

     

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    The boy was seen _______ on the sports ground.

    [     ]

    A. to play
    B. play
    C. played
    D. to playing

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    The boy was seen ________ on the sports ground．

    [　　]

    A．to play

    B．play

    C．played

    D．to playing

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