While building a tunnel through the mountain, . A. the workers discovers discovered B. an underground lake was discovered C. there was an underground lake discovered D. the lake was discovered undergr 题目和参考答案——青夏教育精英家教网—

题目内容

While building a tunnel through the mountain, _____.

A. the workers discovers discovered

B. an underground lake was discovered

C. there was an underground lake discovered

D. the lake was discovered underground

解析:

考查一致性（非谓语动词作状语，其逻辑主语必须与句子主语保持一致；如果不一致，则要用独立主格结构或用从句。building的主语应是人，故答案为A；

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