Many people believe we are heading for environmental disaster _____we radically(彻底地) change the way we live.
Though bought several years ago, the car is still in good .
Tom is the firsthe is wrong.
Every possible meansto prevent the air pollution, but the sky is not still clear.
,the wind died down and people began to appear on the street.
The number of the workers in this factory300, that is to say, it20%.