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

     

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    While building a tunnel through the mountain, _____.

           A. an underground lake was discovered      B. workers discovered an underground lake

           C. there was an underground lake discovered  D. a lake was discovered underground

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    While building a tunnel through the mountain, _____.

           A. an underground lake was discovered

          B. workers discovered an underground lake

           C. there was an underground lake discovered

           D. a lake was discovered underground

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    While building a tunnel through the mountain, _______.

    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

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    While building a tunnel through the mountain,  ______ .
    [     ]
    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 

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    16. While building a tunnel through the mountain, _______ .

    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

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