【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
Only factories produce heavy smog .
B.
It tells us two ways to protect environment.
C.
Taking public traffic is good for the environment.
D.
Ordinary people can do nothing to help control smog.
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...