How do they get to the museum? A: They take the underground. B: They take a taxi. C: They take the underground and then a taxi.

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

以下全指交通工具的是哪一组？ A: coach， train， underground， characte B: train， bicycle， underground， ship C: motorcycle, underground, plane, kind D: underground, plane, train, friendly

I ____a car, so I go to work by underground. (have)

They will take _____ to the museum. A: a taxi B: the underground

The Underground Railroad is the real subway established in the US?

n. [c] (bre underground) 地铁 : ______

Cost of pipeline is very different of underground conditions. Is it right? （）

The release of chemicals from underground storage would pollute

What is mentioned as a consequence of extracting water from deep underground?