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sudden, a car cut in and knocked me down. —You can never be careful in the street. A. much B. very C. so D. too 6. most of the earth’s surface is covered by water, fresh water is very rare and precious. A. As B. Once C. If D. Although 7. It is known to all that you exercise regularly, you won’t keep good health. A. unless B. whenever C. although D. if 8. you call me to say you’re not ing, I’ll see you at the theatre. A. Though B. Whether C. Until D. Unless 9. He was about to tell me the secret someone patted him on the shoulder. A. as B. until C. while D. when 10. —Did you remember to give Mary the money you owed her? —Yes. I gave it to her I saw her. A. while B. the moment C. suddenly D. once 11. The WTO cannot live up to its name it does not include a country that is home to one fifth of mankind. A. as long as B. while C. if D. even though 12. They wanted to charge $5000 for the car, we managed to bring the price down. A. but B. so C. when D. since 13. —Somebody wants you on the telephone. — no one knows I’m here. A. For B. And C. But D. So 14. Follow your doctor’s advice, your cough will get worse. A. or B. and C. then D. so 15. Unlike watching TV, reading is a highly active process (過程 ) it requires attention as well as memory and imagination. A. until B. but C. unless D. for 16. Lose one hour in the morning you will be looking for it the rest of the day. A. but B. and C. or D. so 17. I am sure that Laura’s latest play, staged, will prove a great success. A. since B. unless C. once D. until 18. To enjoy the scenery, Irene would rather spend long hours on the train travel by air. A. as B. to C. than D. while 19. I hope you don’t mind me asking, where did you buy those shoes? A. so B. and C. yet D. but 20. Paul had to write a history paper, he couldn’t find time to do it. A. but B. so C. because D. if 21. Stand over there you’ll be able to see it better. A. or B. while C. but D. and 22. There are many kinds of sports, my favorite is swimming.