26. I had wanted to help you last night but I couldn’t spare any time, for I _______ a composition　 which I have to hand in this morning.

　　　 A. wrote　　　　　　　　　　　 B. was writing　　　　　　　　　　 C. had written　　　　　　　 D. have written

25. _______ seems to be a strong competition in China for senior high students to enter college or university.

　 　　 A. It　　　　　　 　　　　 B. There　　　　 　　　　　　　 C. What　　　　 　　　　 D. That

24. -When can I use your computer?

-Never! _______　 should you touch it.

　　　 A. At no time　　　　　　　　 B. In no time　　　　　　　　 C. At any time　　　　　　　 D. At one time

23. Only ticket-holders were _______ to the stadium for the concert given by Jay Chou, so many of his fans were turned away.

　　 A. allowed B. permitted　　　　　　　　 C. agreed　　　　　　　　　　　 D. admitted

22. _______ person like him won’t be satisfied with _______ little progress that he has made.

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

5、(1)C₂₄H₁₂　　　　　　 (2)胶体　　 　　　 (3)51：50

(4)

4、(1)

(2)反应液微沸有红棕色气体充满A容器

(3)除去溴苯中的溴

(4)除去溴化氢中的溴蒸气

(5)石蕊试液，溶液变红色

3、(1)　　　　　　　　　　　　　　　　　　　　　　　　　

(2)

(3)稳定　 (4) ad

1、D　　　　　　 2、C