If people keep ________ the river, there will be no fish in the river.
A. polluting B. pollute C. polluted D. to pollute
Please wait. She ________ to you in a few minutes.
A. talk B. talked C. have talked D. will talk
We love________．We don't like the war (战争)．
A. culture B. peace C. battle D. history
—Do you think that there will be more trees in the mountains? —________
A. I hope so. B. Yes，I hope not.
C. Oh，really? D. Yeah，there will be fewer trees.
—If there are __________people driving , there will be _________air pollution.
—Yes, the air will be fresher.
A. less ; less B. less ; fewer
C. fewer ; fewer D. fewer ; less
You can read all kinds of books ________ computers in 10 years.
A. in B. on C. at D. of
