"greenhouse gases" ,汉语表达为：

A. 绿房子气体
B. 温室气体
C. 花房气体

The shortened form of "carbon dioxide"is :⒉

A. H2O
B. CO
CO2

When we leave the room at night ,we should ______ the lights.

A. turn on
B. turn down
C. turn off
D. turn over

Carpooling means ________________.

In order to lead a low carbon life ,we should _________ in our daily life.

A. carpool
B. ride a shared bicycle
C. classify garbage
D. use a cloth bag instead of plastic bags
E. turn off the computer when we do not use it any more