"greenhouse gases" ,汉语表达为：
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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
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