The air in Dongying is much worse than that in many other cities. We must do to protect our environment.
A. nothing B. anything C. something D. everything
一I don’t think history is more useful than physics.
—I disagree. In my opinion, history is _______________physics.
A. as useful as B. not so useful as
C. less useful than D. the most useful of
—How difficult physics is! I really want to drop it !
—_________you come on，you will do it better.
A. As long as B. As soon as
C. Though D. While
Of all the teachers I love the ones who are___________ because they treat students as their family members.
A. the strongest B. the friendliest
C. the most experienced D. the funniest
David likes vegetables,__________ tomatoes, potatoes and cabbages.
A. of course B. after all
C. and so on D. such as
—Is David coming by train?
—He should, but he not. He likes driving his car.
A. can B. need
C. must D. may
