—The air pollution is terrible.
— It will be worse ________ we take action to protect the environment.
A. if B. unless C. until D. when
There will be _____jobs for people because some robots will do the same jobs as people
A. many B. more C. fewer D. fewest
—Could you please tell me ________?
—Of course. Many people in Wuwei know it.
A. where is Mount Wudang
B. how can I get to Wulong River
C. what is Shenlongjia famous for
D. if there will be a new airport in Wuwei
We are glad to hear that the terrorists ________ by the brave policemen several days ago.
A. are caught B. were caught
C. have been caught D. are going to be caught
—Mom, must I take out the trash now?
—No, you ________. You may take a rest first.
A. mustn’t B. can’t
C. shouldn’t D. don’t have to
________ we deal with our problems, we can easily become unhappy.
A. Until B. If C. Unless D. Though
