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    30．While building a tunnel through the mountains, . A．an underground lake was discovered B．there was an underground lake discovered C．a lake was discovered underground D．the workers discovered an underground lake. 【查看更多】

     

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    While building a tunnel through the mountains, ______.

    A．an underground lake was discovered B．there was an underground lake discovered
    C．a lake was discovered undergroundD．the workers discovered an underground lake

    查看答案和解析>>

    While building a tunnel through the mountains, ______.

    A．an underground lake was discovered

    B．there was an underground lake discovered

    C．a lake was discovered underground

    D．the workers discovered an underground lake

     

    查看答案和解析>>

    While building a tunnel through the mountains, _____________.

    A．an underground lake was discovered

    B．there was an underground lake discovered

    C．a lake was discovered underground

    D．the workers discovered an underground lake.

    查看答案和解析>>

    While building a tunnel through the mountains, _____________.

    A．an underground lake was discovered

    B．there was an underground lake discovered

    C．a lake was discovered underground

    D．the workers discovered an underground lake.

     

    查看答案和解析>>

    While building a tunnel through the mountains, ________.

    [　　]

    A．an underground lake was discovered

    B．there was an underground lake discovered

    C．a lake was discovered underground

    D．the workers discovered an underground lake

    查看答案和解析>>


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