A、
Power plants burn coal.
B、
Factories pour sewage.
C、
People bury trash underground.
D、
City population increases greatly.
【正确答案】
A
【答案解析】
A、
People are driving cars with electricity.
B、
Scientists are producing cleaner energies.
C、
Factories are installing smoke-cleaning equipment
D、
People are using new materials which don't need to be burned.
【正确答案】
C
【答案解析】
A、
Passive.
B、
Optimistic.
C、
Pessimistic.
D、
Complaining.
【正确答案】
B
【答案解析】
提交答案
关闭