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    Look! The boys happily in the river. A. swim B. swam C. will swim D. are swimming 【查看更多】

     

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    Look! The boys ________ happily in the river.

    A. swim

    B. swam

    C. will swim

    D. are swimming

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    Look! The boys ________ happily in the river.

    [　　]

    A．swim
    B．swam
    C．will swim
    D．are swimming

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