Our country has a problem with its air pollution.________must be done!
A. Everything B. Something
C. Anything D. Nothing
Everyone in our family cares about the environment and we________ trees every year.
A. plant B. planted
C. are planting D. have planted
It was careless of Lucy to________ the same mistake once again.
A. recycle B. reduce C. reuse D. repeat
—Jerry，________ are you going to do with the old newspapers?
—I'm going to take them to the recycling centre.
A. how B. what C. which D. where
To protect the environment，we are trying our best to make our school a________ school.
A. large B. new C. cool D. green
The shop is not far.Mary will walk________ ride a bike there.
A. and B. but C. or D. so
