27. -Can you help me download some popular songs from your computer?

-_______, but I must finish typing the article first.

　 A. I’d love to　　　　　　　　　 B. I’m afraid not　　　 C. Certainly not　　　　 D. Never mind

26. Thank you, Mr. Chen. I’m wondering how to ______ the great help you gave me during my study this year.

　 A. pay back　　　　　　　　　 B. keep back　　　　　　　 C. hold back　　　　　　　 D. look back

25. Our class ______ the biggest in Grade Three and our class ______ all crazy about pop music.

　 A. are; is　　　　　　　　　　　 B. are; are　　　　 　　　　 C. is; are　　　　　　　　　　 D. is; is

24. The new rule, ______ to prevent drivers from driving after drinking, is to come into effect next week.

　 A. to intend　　　　　　　　　 B. intended　　　　　　　　 C. intending　　　　　　　 D. to be intended

23. -I _____ there is going to be a football match between Germany and Brazil this evening.

-Really? It must be very exciting.

　 A. was told　　　　　　　　　 B. have told　　　　　　　 C. have been told　　 D. am told

22. -What’s the market ______ of their car in China?

-About 18 percent at present.

　 A. share　　 　　　　　　　　　 B. number　　　　　　　　　 C. sales　　　　　　　　　　　 D. figure　

20．(本题满分16分)

设数列满足，令.

⑴试判断数列是否为等差数列？并说明理由；

⑵若，求前项的和；

⑶是否存在使得三数成等比数列？

江苏省范集中学09-10学年高一下学期期末试题