28. - Do you think he would have given you a hand in your time of financial difficulty?

- He _______ if he had known about it. We are very good friends.

A. must have　　　　　 　 B. can’t have　　　　　　 　 C. wouldn’t have 　　D. should have

27. He now lives away from his parents and misses them _　　 enjoy his exciting life at the 　university.

A. too much to　　　　 　 B. enough to　　　　　　　 　 C. very much to　　　　 D. much so as to

26. _____for Liu Xiang’s effort , we wouldn’t have won an Olmpic gold medal in track and field.

　 A. If it weren’t　 　　B Were it not　 　　　　C Should it not be　 　D Had it not been

25. I want to improve my English. Don’t _________ to correct me if I make a mistake.

A. mind　　 　　　　 B. hesitate　　　 　 C. desire　　　 　　 D. seek

24.　　 – Has any of you seen the film, Amazing Tales: Three Guns?

– _________.

A. No one 　 　　　 B. Not　　　　　　　　　 C. None 　 　　　　 D. Not any

23.　　 _________ the illegal mobile WAP sites worries many parents.

A. The children’s surfing 　 　　　　　　 B. The children surf

C. The children surfing 　 　　　　　　　　 D. The children have surfed

22.　　 He is so happy _________ his father has promised to buy him an MP5 player.

A. that 　 　　　　　　 B. while　　　　　　　　 C. which 　 　　　　 D. because

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.　　 – What’s the matter? You really look down.

– _________.

A. Why, I always look up to you 　

B. Me? I never look down upon anybody

C. I am looking for my pen on the floor 　

D. I failed an important test

略

34、(10分)一年一度的高考来临时，保健品市场常出现很多脑保健品，有些产品是通过给大脑持续补充磷脂酰胆碱，有效合成记忆传递因子--乙酰胆碱(Ach)的。当人大脑里乙酰胆碱浓度增高时，信息传递快，记忆增强，思维敏捷。下图为实验人员研究Ach浓度与反应时间的简图，A处注入不同浓度的Ach，B处给予恒定刺激，C、D处分别为灵敏感应时间测量点。(轴突中已除去了突触小泡)

I、

在神经纤维上的细胞膜外侧，兴奋传导的方向与局部电流的方向_________。兴奋在神经元之间传递是通过_________来传递。在轴突末端膨大形成的结构中，信号的转换过程是_________ 。　　 ，

II、

下表为在不同浓度的Ach刺激B点后到C、D两处感受到信号所用的时间。请分析回答：

⑴、C处数据说明了________________________________________。

⑵、D处数据说明了________________________________________。

⑶、在轴突中除去突触小泡的目的是________________________________。