27. - David, keep _______ in mind that you have to be home by 10 o'clock.

- OK, Mom, I will.　

A. it　　 　　　　　　 B. me　　　　　　　 C. this　　 　　　　 　　　　D. one

26. 　　　and I’ll get the work finished.

A. One more hour　 B. Having one more hour　 C. Given one more hour　 D. If I have one more hour

25. He will stop showing off, if no notice　　 of him.

A. is taken　　　　　　　 B. will be taken　　　　　　 C. taken　　　　　　　　　　　　　　 D. has taken

24. - Has your former classmate come back from America?　

- Yes, he　 _______ there for eight years.

A. has stayed　 　　 B. stays　　　　　　 　 C. stayed　　　 　　　 　　　　　　　　 D. had stayed

23. I’ is a free website ______learners can not just learn various languages but also chat online.

A. where　　　　　 　　　　　　 B. which　　　　　 　　　　　 C. that　　　　　 　　　　　　　　　　　　　　 D. what

22. When it　　 air pollution, Beijing faces the three “C” s, cars, coal and construction, which lead to Beijing’s thick air pollution.

A. refers to　　　　　　　　　　 B. comes to　　　　　　　　 C. happens to　　　　　　　　　　　　　 D. speaks to

第一节：单项填空(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.－Shall I look after your house while you are away?

　 －______.

A. If you like　　 　　 B. It couldn't be better.　　 　　　 C. Of course you can.　　 D. It's up to you.

23. 已知函数,.

(1)若求函数上的最大值和最小值；

(2)若函数的图象上有与x轴平行的切线，求a的取值范围.