While building a tunnel through the mountain, . [ ] A．an underground lake was discovered B．there was an underground lake was discovered C．a lake was discovered underground D．the workers discovered 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．an underground lake was discovered

B．there was an underground lake was discovered

C．a lake was discovered underground

D．the workers discovered an underground lake

答案：D
解析：

分词作状语要注意与其逻辑主语一致。

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