A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.

Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．

"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

He said further studies are required to confirm the findings.

Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."

Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

64．What’s the best title of this passage?

  A．Sunshine 'helps to keep you young'

  B．Vitamin D has a protective effect on many diseases

  C．Telomeres - a biological marker of ageing

  D．People have found the secret to having a long life

65．How can people get vitamin D?

    A．through water            B．through sunshine     

       C．through food                 D．both B and C

66．What does the underlined word in paragraph three refer to?

    A．It refers to a kind of vitamin that can keep you young.

    B．It refers to a biological marker of ageing found in DNA.

    C．It refers to a kind of element that can be obtained from sunshine.

    D．It refers to a part of the body.

67．Which of the following is not true according to the passage?

    A．women with high levels of vitamin D shows a sign of being biologically younger and healthier.

    B．vitamin D has a protective effect on many ageing related diseases.

    C．too much sunshine may increase our risk of skin cancer.

    D．It has been proved that sunshine 'helps to keep you young'.

阅读下列应用文及相关信息，并按照要求匹配信息。

首先，请阅读下列中国旅游城市的介绍：

A．Beijing

For travelers in China, Beijing is a must, as it is a political and cultural center and it offers many scenic attractions. Foods are very popular with tourists as well, such as authentic（真正的） Beijing roast duck and instant-boiled mutton.

B. Shanghai

You know what? Shanghai is one of the developed cities in China. It is a commercial （商业的）and industrial （工业的）city. Tourists will be satisfied with what the city supplies, from various snacks and cakes to handcrafts and textiles. Spring and autumn are the best seasons to visit the city.

C. Suzhou and Hangzhou

Suzhou and Hangzhou are two cities near Shanghai. They were once described by Italian traveler Marco Polo as the most beautiful and prosperous （繁荣的）cities in the world. Both of them are called “Paradise （天堂）on Earth”.

D. Xi’an

Xi’an is the capital of Shanxi Province. It dates back over 2,000 years as an ancient capital which served as the capital for many dynasties in the Chinese history. It is also the starting pointing of the famous ancient Silk Road. The life-size terra cotta soldiers and horses of the Qin Dynasty are described as the “Eighth Wonder of the world”.

E. Harbin

If you want to travel in winter, Harbin is particularly good for sightseeing in January and February. If you have never seen any snow, you may enjoy the ice festival and even go skiing and skating in this world of snow.

F. Kunming

Kunming is regarded as “Scenic City of Eternal Spring” because of its year-round spring weather.

You may find almost every kind of Asian flowers there.

以下是几个人物的信息，请将人物与旅游城市匹配起来。

1.The Whites want to visit China recently. They are fond of Asian cultures. They are both professors of botany, who are interested in the study of species（物种）. They expect to discover new species of plants, especially about flowers that no one has ever seen during the trip.

2.Tony is a British young man who likes to play online games. He learns a lot about world history while playing games. Tony is very fond of the history of ancient China and curious about how Qin Shi Huang managed to unite all the seven states.

3.Mark is a sport lover. His hobbies include horse-riding, wrestling, boating, skating and skiing. He is looking forward to a trip with his parents next winter holiday when he can have fun on the snow.

4.Jack is a retired （退休的）teacher in Texas. He has been teaching for over 30 years. He enjoys traveling and tasting all kinds of food in other countries. Recently his friends invited him to a city in China, where he could have some traditional Chinese food such as duck cooked in a special way.

5.Lily is a middle school student who loves reading. Among all her books, she loves the one written by Marco Polo describing a place called “Paradise on Earth” best. She always dreams about taking a trip there one day.

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.
Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.
Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.
Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．
"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."
He said further studies are required to confirm the findings.
Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."
Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
【小题1】What’s the best title of this passage?

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.

Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．

"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

He said further studies are required to confirm the findings.

Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."

Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.What’s the best title of this passage?

  A.Sunshine helps to keep you young.

  B.Vitamin D has a protective effect on many diseases.

  C.Telomeres - a biological marker of ageing.

  D.People have found the secret to having a long life.

2.How can people get Vitamin D?

A.through water.       B. through sunshine.

C.through food.        D.both B and C.

3.Which of the following is not true according to the passage?

    A.women with high levels of vitamin D shows a sign of being biologically younger and healthier.

    B.vitamin D has a protective effect on many ageing related diseases.

    C.too much sunshine may increase our risk of skin cancer.

    D.It has been proved that sunshine helps to keep you young.

         All of us eat every day, but most of us don’t understand nutrition. We often make mistakes in talking about good diet.

For example, many people think that foods such as rice, bread and potatoes will make one grow fat. In fact, these foods are very good to one’s health. They are good sources of many vitamins. And in comparison with steak and beef, they contain less amount of calories.

Some people don’t like canned(罐装的) or frozen vegetables, because they think fresh vegetables cooked at home are always better. This is again wrong. In fact, whether the vegetables are good or not depends more on how they are prepared. Overcooking, for example, destroys good qualities of vegetables. Vegetables cooked in too much water can lose a large amount of vitamins.

It is widely believed extra vitamins provide more energy. But taking more than the body needs doesn’t make it function better.

It is also wrong to say that vegetables grown in poor, worn-out soil are lower in vitamins than vegetables grown in rich soil. The vitamins in our foods are in the plants themselves. They don’t come from the soil. However, the minerals(矿物质) in a plant depend on the minerals in the soil.

In short, there are many false ideas about nutrition. We need to correct them.

46. This passage is mainly about_______.

A. nutrition                B. vitamins                C. vegetables            D. health

47. Rice, bread and potatoes do good to people’s health mainly because_______.

A. they make people fat                              B. there are lot of vitamins in them

C. they contain less amount of calories compared with steak and beef.

D. both B and C.

48. Why don’t some people like canned or frozen vegetables? Because______.

A. they think fresh vegetables contain less vitamins

B. they think fresh vegetables contain more vitamins than the canned or frozen ones

C. they don’t think the canned or frozen vegetables are fresh

D. they don’t think the canned or frozen vegetables taste as good as the fresh ones

49. Which of the following is true according to the passage?

A. Many people know almost everything about nutrition.

B. Food such as rice, bread and potatoes make people fat.

C. vegetables grown in poor worn-out soil may have the same amount of vitamins as vegetables grown in rich soil.

D. extra vitamins provide less energy.

50. The point of the passage is that______.

A. the minerals in a plant depend on the minerals in the soil

B. people make mistakes when talking about good diet

C. taking more vitamins than the body needs doesn’t make it function better

D. vegetables cooked in too much water can lose a large amount of vitamins