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    The boy was observed basketball at eight o’clock yesterday. A. playing B. play C. to play D. having played 【查看更多】

     

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    The boy was observed __________ basketball at eight o’clock yesterday.

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

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    The boy was observed __________ basketball at eight o’clock yesterday.

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

    查看答案和解析>>

    The boy was observed __________ basketball at eight o’clock yesterday.

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

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    The boy was observed ________ basketball at eight o'clock yesterday．

    [　　]

    A．playing

    B．play

    C．to play

    D．having played

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