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2.环境污染问题越来越受到人们的关注,造成环境污染的主要原因大多是由于人类生产活动中过度排放有关物质引起的。下列环境问题与所对应的物质不相关的是

   A.温室效应--二氧化碳               B.光化学污染--二氧化氮

   C.酸雨--二氧化碳                   D.白色污染--一次性塑料制品的使用

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1.在元素周期表中位于金属元素和非金属元素交界处最容易找到的材料是

   A.制催化剂的材料                    B.耐高温、耐腐蚀的合金材料

   C.制农药的材料                      D.半导体材料

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11.(09江苏) He did not regret saying what he did but felt that he      it differently.

A. could express             B. would express

C. could have expressed         D. must have expressed

[答案]C

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10.(09全国2) I can’t leave. She told me that I      stay here until she comes back.

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

[答案]B

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9.(09重庆)  -Hi, Tom. Any idea where Jane is?

-She_____in the classroom. I saw her there just now.

A. shall be  B. should have been

C. must be   D. might have been

[答案]C

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8.(09天津) This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.

A. would      B. should   C. could    D. might

[答案]B

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7.(09四川) -I don’t care what people think.

-Well, you _______

A. could   B. would  C. should     D. might

[答案]C

[解析]考查情态动词的用法。答话的人提了一个建议--你应该关注别人对你的评价的。should可以用来向别人提建议,所以答案为:C

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6.(09上海) It_____ have been Tom that parked the car here, as he is the only one with a car.

A. may     B. can       C. must      D. should

[答案]C

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5.(09海南) What do you mean, there are only ten tickets? There      be twelve

A. should                            B. would

C. will                               D. shall

[答案]A。 你这是什么意思,只有十张票吗?应该有十二人。should表示“应该,应当”。

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4.(09湖南)- It’s the office! So you     know eating is not allowed here.

- Oh, sorry.

A. must           B. will           C. may            D. need

[答案]A 句意为:这是办公室!因此你必须知道吃的不允许带到这里。must表示“绝不”的意思。

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