If we know about what causes endangerment, we may be able to takes measures it is too late.A. until B. unless C. when D. before 题目和参考答案——青夏教育精英家教网—

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If we know about what causes endangerment, we may be able to takes measures______ it is too late.

A. until B. unless C. when D. before

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Listening to foreign broadcast easier 1. _______

if we know something about. There are clues 2. _______

that can help us. One clue is the time of 3. _______

day. Morning programs usually contains many 4. _______

short items of news，informations，etc. The 5. _______

items are short because of most of us are 6. _______

getting ready to going to work in the 7. _______

Often we do not have time listen 8. _______

to long programs. There are time for more 9. _______

details about the subjects discuss 10. ______

in evening programs.

___ , we would have taken raincoats with us.

A. Had we known B.We had known it C. If we were known D.If we know

It helps us understand the world better if we know a little geography and have some maps at hand.But with maps in Chinese only,misunderstanding is possible in studying world events.Chinese names are long,hard to pronounce and without meaning to a foreigner.For the opening of the country maps are important and helpful and needed badly.

I wish maps in various languages,such as those used in the United Nations,would come out and be sold in all bookstores open to Chinese.

1.The writer is mainly talking about 　　　.

A.geography　　　　　　　　　　　　　 B.maps

C.Chinese names　　　　　　　　　　　 D.the opening of the country

2.Knowing a little geography and having some maps in Chinese only,a foreigner 　　　.

A.can study world events easily

B.can study world events without misunderstanding

C.can’t study world events without misunderstanding

D.will feel joy in studying world events

3.What are the difficulties for a foreigner to use a map in Chinese?

A.A foreigner has nowhere to buy a map.

B.All the bookstores only open to Chinese.

C.The names of Chinese people are long,hard to pronounce and without meaning.

D.The names of places on a map in Chinese are long,hard to pronounce and without meaning.

4.In the United Nations people use maps in 　　　.

A.foreign languages only　　　　　　 B.Chinese only

C.various languages　　　　　　　　　 D.English only

When we learn English, we always find we have difficulties in remembering the names of the months. Therefore, if we know something about the history of the months, possible it won’t be very hard for us to remember them. The followed is one example. January was named by God Janus. He was a strange god because he has two faces. He could look in the two directions. He could look forward or backward at the same time. He was the god of endings and beginnings. January is the month that one looks forward to the New Year and thinks about the past year.

Now can you share us the stories about the rest of the months?

SCIENTISTS have discovered that living to the age of 100 may have nothing to do with the lifestyle you lead and everything to do with the type of genes (基因) you have.

For the lucky carriers of “Methuselah” genes, worries over smoking, eating unhealthily and not getting enough exercise may not be as necessary as to those of us without the special gene pattern .

The “Methuselah” genes could give extra protection against the diseases of old age such as cancer and heart disease. They could also protect people against the effects of the unhealthy lifestyles that we believe will lead us to an early death, scientists say. However, the genes are very rare.

The genes include ADIPOQ, which is found in about 10 percent of young people but in nearly 30 percent of people living past 100. They also include the CETP and the ApoC3 genes, which are found in 10 percent of young people, but in about 20 percent of people over 100 years old.

Some of those genes were discovered by a research group at the Albert Einstein College of Medicine in New York, led by Professor Nir Barzilai. The team studied the genes of over 500 people over 100 years old, and their children.

The studies show that tiny mutations (变异) in the make-up of some genes can greatly increase a person’s lifespan. Barzilai told a Royal Society conference that the discovery of such genes gave scientists clear targets for developing drugs that could prevent age-related diseases, allow people to live longer and stay healthy.

David Gems, a researcher at University College London, believes that drugs to slow ageing will become widespread.

“If we know which genes control longevity (长寿) then we can … target them with drugs. That makes it possible to slow down ageing,” he told The Times.

“Much of the pain and suffering in the world are caused by ageing. If we can find a way to reduce that, then we are obliged to take it.”

1. According to the article, which of the following is the most important if a person is to live to the age of 100?

A. Eating healthy food every day.

B. Having the right types of genes.

C. Having a healthy lifestyle.

D. Taking drugs that prevent ageing.

2.According to the article, the ApoC3 gene is found in ______ of people over 100 years old.

A. 10% B. 20% C. 30% D. 50%

3.Which of the following statements is TRUE of the research led by Professor Nir Barzilai?

A. The team studied the genes of over 100 people over 100 years of age.

B. The researchers found that mutations in certain genes lead to longer life.

C. The researchers found ways to develop drugs that could cure age-related diseases.

D. The study suggested that most people have genes that could lengthen their lives.

4. According to David Gems, ______.

A. drugs to slow ageing will be very expensive

B. modern science will be able to find more longevity genes

C. it is the duty of medical scientists to fight the problems of ageing

D. scientists can make new genes that will allow longer life

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