题目内容

【题目】完成句子

【1】So far he ______________________________the paper.

到现在为止,他应该已经完成论文了。

【2】Will you __________________________________your coffee?

你愿意再往你的咖啡里加些糖吗?

【3】 This is the river ________I__________________________ swimming.

这是我过去常去游泳的小河。

【4】__________________________ you can't go to his birthday party.

真遗憾你不能去参加他的生日晚会了。

【5】________________________that he's not the right person for the job.

我已经得出结论,他不是这一工作的合适人选。

【答案】见解析

【解析】【1】is supposed to have finished

【2】add more sugar to

【3】where;used to go

【4】It's a pity that

【5】I've come to the conclusion

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【题目】Mark Twain was a great writer. He was from the USA. He was born in 1835. He was also a famous speaker. He was famous for his sense of humor. Many people liked to listen to him talk because he liked to tell some interesting stories to make people laugh all the time.

One day Mark Twain was going to a small town because of his writing. Before he was going to leave, one of his friends said to him that there were always a lot of mosquitoes(蚊子) in the town and told him that he’d better not go there. Mark Twain waved (摇动) his hand and said, “It doesn’t matter. The mosquitoes are no relatives of mine. I don’t think they will come to visit me.”

After he arrived at the town, Mark Twain stayed in a small hotel near the station. He went into his room, but when he was just about to have a rest, quite a few mosquitoes flew about him. The waiters felt very sorry about that. “I’m very sorry, Mr. Mark Twain. There are too many mosquitoes in our town.” One of them said to him.

Mark Twain, however, made a joke, saying to the waiter, “The mosquitoes are very clever. They know my room number. They didn’t come into the wrong room.” What he said made all the people present laugh heartily.

But that night Mark Twain slept well. Do you know why? That was because all the waiters in the hotel were driving the mosquitoes away for him during the whole night.

【1】That day Mark Twain went to the town _____.

A. to see one of his friends

B. because he wanted to do something there for his writing

C. because he was told there were a lot of mosquitoes there

D. to see one of his relatives

【2】The waiters felt sorry because _____.

A. they did something wrong to Mark Twain

B. their hotel was too small

C. there were quite a few mosquitoes in Mark Twain’s room

D. the room was not very clean

【3】All the people present laughed heartily because _____.

A. Mark Twain made a joke

B. the mosquitoes knew Mark Twain’s room number

C. Mark Twain gave the waiters some nice presents

D. the mosquitoes were very clever and they didn’t come into the wrong room

【4】From the story we know _____.

A. no mosquitoes troubled Mark Twain in the night

B. the owner of the hotel told the waiters to look after Mark Twain well at night

C. Mark Twain didn’t have a good rest that night

D. there were not mosquitoes in the hotel any longer

【题目】阅读下列短文,从每题所给的四个选项(A、B、C和D)中选出最佳选项。

Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule,protecting them from the body-and the body from them-until they can be released at just the right spot. There are lots of ways to trigger(引发)this release,including changing temperature,acidity,and so on. But triggers can come with their own risks-burns,for example. Now,researchers in California have designed what could be a harmless trigger to date:shining near-infrared light(NIR,近红外线)on the drug in the capsule.

The idea of using light to liberate the drug in the capsule isn't new. Researchers around the globe have developed polymers(聚合物)and other materials that begin to break down when they absorb either ultraviolet(UV,紫外线)or visible light. But tissues also readily absorb UV and visible light,which means the drug release can be triggered only near the skin,where the light can reach the capsule. NIR light largely passes through tissues,so researchers have tried to use it as a trigger. But few compounds(化合物)absorb NIR well and go through chemical changes.

That changed last year when Adah Almutairi,a chemist at the University of Califomia,San Diego,reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIRabsorbing group called onitrobenzyl(ONB).When they catch the light,ONB groups fall off the polymer,leading to its breakdown. But ONB is only a so-so NIR absorber,and it could be poisonous to cells when it separates from the polymer.

So Almutairi and her colleagues reported /span>creating a new material for capsules that's even better. This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的)components that make it highly unstable in its polymeric form,a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols,they cap each reactive component with a light-absorbing compound called Bhc. When the Bhcs absorb NIR light,the reactive groups are exposed and break the long polymer into two short chains. Shining additional light continues this breakdown,potentially releasing any drugs in the capsule. What's more,Almutairi says,Bhc is 10 times better at absorbing NIR than is ONB and is not poisonous to cells.

【1】According to the passage,which of the following could be the best trigger?

A.Temperature change.

B.NIR light.

C.Acidity change.

D.UV light.

【2】Why is ONB unsatisfactory?

A.It breaks down when it absorbs NIR light.

B.It falls off the polymer and triggers drug release.

C.It has not come onto the market up till now.

D.It is not effective enough and could be poisonous.

【3】Which word can be used to complete the following process of changes?

A. protected

B.formed

C.exposed

D.combined

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