A healthy amount of sunshine may be the secret to staying young. British scientists have discovered.
Vitamin D is produced naturally by the skin in response to (对…的反应) 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 become more susceptible (易受伤害的) to certain 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 show 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."
Professor Tim Spector, a co-author of the report, added, " Although it might sound absurd(荒唐的), 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 percent of the body's supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
1.A certain amount of sunshine helps people stay young because _________.
A. people feel happy and energetic in the sun
B. vitamin D may help to slow the ageing process
C. sunshine protects people against heart disease
D. vitamin D makes one's skin look young and healthy
2.From Brent Richards, we know that ________.
A. sunlight causes skin cancer to people with high level of vitamin D
B. the study generally has a healthy effect on the general ageing process
C. the higher levels of vitamin D people have, the more slowly people may age
D. vitamin D can only be got from fish, eggs and breakfast cereals
3.What can we infer from the passage?
A. Sunlight does more good than harm to our health.
B. Telomeres are important as they are signs of ageing of the DNA.
C. Sunlight can be dangerous as it causes skin cancer.
D. Vitamin D can also be gained from food.
4.What is the best title of the passage?
A. Secret of Staying Young
B. Sunlight and Vitamin D
C. Vitamin D Helps Slow Ageing
D. Sunlight and Health
假定你是李华，现在你学校很多学生因为种种原因很少参加体育锻炼。请你就此事为你校英语报写一封英语信倡导同学们积极参与体育锻炼。
内容包括：
1.同学们不参加体育活动的原因；
2.进行体育活动的好处。
注意：1.词数100左右；
2.可以适当增加细节，以使行文连贯；
3.文章开头和结尾语已给出，不计入总词数。
Dear schoolmates,
Nowadays, most students don’t do sports for kinds of reasons.
________________________________________________________________________________________
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Yours sincerely,
Li Hua
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10 处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词：
2.只允许修改10处，多者（从第11处起）不计分。
Dear editor，
I’m sorry to occupy your precious time, and I really want to tell you anything about the problem of some people keeping too many pets nowadays. I take the problem more and more seriously for the following reason. First of all, as it is known to people, pets make loud noise that trouble residents a lot. What’s more, it is widely accepted that animal waste pollutes the environment, where makes people quite uncomfortable. Many owners like taking their pets to public place where they may frighten children or even bite people. The mostly important is that pets can spread some diseases and this has attracted much attention. Take all these factors into consideration, I sincerely hope that I can get help from you and expect the media do something for this.
Yours truly,
Wang Lin
1.The world will be different, and we will have to be prepared to ____ ____ （适应）the change.
2.Taking a holiday then is ____ ____ ____ ____(不可能的); you’ll have to arrange it for some other time.
3.You have done so much work that you ____ ____ ____（一定能）grasp the technology.
4.As I opened the door, I found little Ben was ____ ____ (归类）the bricks into different colors alone.
5.This is a charity that raises money for women and children ____ ____ (在闲难中).
1.Ellen was a______ with Duncan for forgetting to phone her in time.
2.A good degree is a minimum ______(要求）for many jobs.
3.Patricia looked as beautiful and ______ (优雅的）as I saw her ten years ago.
4.Though he was small, Tom managed to d______ the table into the kitchen.
5.What experience do you have that is ______（有关的）to this position?
We're offering free tickets to go and see a film called A Year in Greenland. The film, which 1. (tell) you all about the plants and animals in that wonderful country, has won 2. prize at the national film festival- it's well worth 3.(see).
The film can only be seen at the new cinema that has just been completed inside the Science Museum in the city centre. It's showing this Sunday with 4. (perform) every hour from midday onwards, with the last showing at 5 o’clock, two hours before the museum closes. So there are six times to choose 5. .
So why not take the whole family to the cinema this Sunday. Children will want to head straight down to the basement 6. the computers are kept. I promise you they’ll come away with all sorts of 7.(excite) pictures they’ve created.
Entrance to the museum is free on Sundays, but it would 8. (normal) cost ﹩3.25 to go and see the film. 9. (get）your free tickets, you should e-mail this program by midday on Friday. We've only got a limited number of tickets, so the 10. (early) you e-mail us, the more likely you are to get one.
