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28. Like some of my classmates, I cannot live up to my teachers’ expectations; _______I let them down.

A. in other words     B. after all

C. what’s more     D. more or less

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27. There was such a long queue for taking money from the bank that I ______ gave up.

A. unfortunately    B. purposefully    C. individually    D. eventually

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26. ---Shall we go to the exhibition or to the concert?

---________.

A. It’s your opinion                       B. I don’t mind

C. That’s your decision                    D. It’s all up to you

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25. When the thief saw the police, he ran _____, but he was caught in the end.

A. like a crazy   B. as crazy   C. like crazy   D. as a crazy

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24. Can you ___ me a job when I get there? You know, I have to work in order to pay for my schooling.

A. provide    B. guarantee    C arrange   D. apply

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23. More attention should be paid ______good habits of reading carefully

A. for forming     B. to form      C. to forming      D. in forming

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22. ____ I admit that the problems are difficult, I don’t agree that they can’t be solved.

A. As              B. When           C. While           D. Despite

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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。

21. -How many people are still leading    life under     poverty line in the world?

-Perhaps one fourth, according to the report.

A. the; 不填;  B. a; the   C. a; a    D. 不填: the

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8.在500g CuSO4溶液中插入两根电极,一电极为铁,一电极为含杂质锌均匀的粗铜。通电一段时间后,切断电源,立即将电极取出,这时铁电极上析出7.04g铜,电解质溶液增重0.02g。求粗铜中锌的质量分数。

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7.在50ml 0.2mol/L 硫酸铜溶液中插入两个电极,通电电解(不考虑水蒸发)。则:

(1)若两极均为铜片,试说明电解过程中浓度将怎样变化          

(2)若阳极为纯锌,阴极为铜片,阳极反应式是             

(3)如不考虑氢离子在阴极上放电,当电路中有0.04mol e通过时,阴极增重     g,阴极上的电极反应式是                       

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