We must try our best to stop pollution ______ a low-carbon(低碳)life.
A. from living B. to live C. living D. live
–I think honesty is the most important thing in doing everything.
–__________ .
A. All right B. Never mind C. I think so, too D. Yes, please
Four hundred dollars for just a pair of shoes? You ______ be joking!
A. may B. can C. can’t D. must
The water ______ cool when I jumped into the pool for morning exercise.
A. was felt B. is felt C. felt D. feels
–Nancy, how long does it take you to fly to Canada?
–Sorry, I don’t know. But I can telephone my father to _____ it for me.
A. do B. check C. catch D. find
The government decided to take some action _______ the situation turned too bad.
A. until B. unless C. when D. before
