26．- Do you have any idea what Paul does all day?

- As I know, he spends at least as much time playing as he ______.

A．writes　 B．is writing　 C．does writing　　 D．does write

25．The peace talks between the two countries have ______. No agreement was reached.

A．been broken down　　　　　 B．broken down

C．been breaking down　　　　　 　 D．been broken up

24. ______is known to all, the Amber Room belongs to the Russians.

A. As　 　　 B. Which　　　 　　　 C. That　　 　 D. What

23. Please remain _____until the plane has come to complete shop.

A. to seat　　 　 B. to be seated　　 C. seating　　 　　 D. seated

22．In many places in China, ______ bicycle is still ______ popular means of transportation.

A．a; the　 　　 B./; a　　　 C．the; a　 　　 D．the; the

第一节　 　单项选择(共15小题；每题1分，满分15分)

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

21. The manager of the company told us that very little ____ was made of the waste material in the past.

　　　 A. cost　　 　 B. vale　　　 　 C. use　　　 　　 D. matter

22.(本小题满分14分)

　 设为常数，且．

(1)若数列是等比数列，求实数的值；

(2)求数列的通项公式；

(3)假设对任意，有，求的取值范围．

江西白鹭洲中学09-10学年高一下学期第二次月考

21. (本小题满分12分)

　 数列是首项为1的等差数列，数列是首项为1的等比数列，设　 ，且数列的前三项依次为1，4，12，

(1)求数列、的通项公式；

(2)若等差数列的公差d＞0,它的前n项和为S_n,求数列的前项的和T_n．

(3)若等差数列的公差d＞0, 求数列的前项的和．