问题

While building a tunnel through themountains, ______.

A:which
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

How long have you ______ ?

ong time ago, there was a mountainAt the top of the mountain___________, in which an old monk used to tellstories

.Shortly after we .the chairman took his place and declared the meeting open .

The policeman warned the young man____after drinking.

It was not just the size of the party last night but ________ it meant to our company________ made it unique.