—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
（题文） is one of the four great inventions of ancient China.
A. The car B. The train
C. Paper-making D. The computer
Look at these dark clouds.I am afraid it ________ soon.So don't forget your umbrella.
A. is raining B. rains C. is going to rain D. was raining
--- The radio says it will rain next Sunday.
--- _____. We’re going for a picnic that day.
A. I hope it will B. I’m afraid not
C. I don’t think so D. I hope not
