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    While building a bridge over the river, . A. many houses along the river were pulled down B. there were many houses along the river pulled down C. an unknown creature was discovered D. the workers discovered an unknown creature 【查看更多】

     

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    While building a bridge over the river, _______.

    A．many houses along the river were pulled down

    B．there were many houses along the river pulled down

    C．an unknown creature was discovered

    D．the workers discovered an unknown creature

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