27. -----It looks as if a storm is coming up. Yes, ________.

　 A.It certainly does 　 B. it certainly is C. it looks so D. it’s coming. 　

26. He told me that little about what they_____he know the moment Li Lei came to question　　　　　 him this morning.

　 A. did did 　　　　　　　　 B. did do 　　　 C. would do 　 D. could do　　　　　　　　

25. This design is ______satisfactory. So you’ll have to try your best to better it.

　 A. nothing but 　B. anything but C. all but 　 　　　 D. everything but　

24.-----Was it last week________ he decided to give up smoking?

　 -----No, he began_________he saw the new film last month.

　 A when, as soon as B. that, till C. when, , after　 　 D. that, directly　　　　

23. Training by yourself in a gym________be highly dangerous.

　 A. must 　　　　　 B. can 　　　　　 C. will 　　　　　　　　 D. shall　　　　　　

22.----Will you be _______this afternoon, John?

　 ----It depends. I’m afraid I’ll be called in by my manager.

　 A.suitable 　　　　 B. convenient C. accurate 　　　　　 D. available　　　　　　　　　　

第一节：语法和词汇知识(共15小题；每小题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，并在答题卡上将该项涂黑。

21. From the day we enter______university, we know _____fierce competition for jobs is　　

　 awaiting us upon graduation.

　 A. an, a 　　　　　　 B. a, a 　　　　　 C a, / 　　　　　　　　　 D. the , /　　　　　　　　　

22.(本小题满分12分)

设等比数列{}的前项和，首项，公比.

(Ⅰ)证明：；

(Ⅱ)若数列{}满足，，求数列{}的通项公式；

(Ⅲ)若，，数列{}的前项和为，求证：当时，.

东北育才学校高三第二次模拟考试