问题

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

正确答案是：

同类题型

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We’re organizing a partynext Saturday, and I’d like you to come.— ______! I have ameeting to attend that day. Thank you all the same.

You should make of the time at school or you’ll regret.

正确答案网

While building a tunnel through the mountain, ________ .