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 discovere 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 discovered

C．

a lake was discovered underground

D．

the workers discovered an underground lake

答案：D
解析：

因为building用的是现在分词形式，可以判断句子主语应与build之间构成主谓关系，所以选D项。

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