Exercise may hold the key to youth, according to a study published on Monday which showed people who keep fit are up to nine years biologically younger than those who do not. The findings are the first to show in humans how keeping fit affects the ageing process.
The study of 2,40twins found that a sedentary（久坐的）lifestyle raises the risk of a range of problems from heart disease to cancer and appears to play a key role in the ageing process.
It all appears to boil down to（归结为）the length of structures called telomeres（染色体终 端）---which protect the DNA on the chromosomes（染色体）,the researchers from King's College London wrote in the Archives of Internal Medicine.
Many studies have shown telomeres get shorter over time, suggesting the cells are ageing or dying. The study, which extracted （提取）a DNA sample from their volunteers, found people who exercised more each week had longer telomeres.
Exercise lowers the risk of a range of problems such as heart disease, diabetes and cancer, the researchers said. “It is not just walking around the block. It is really working up a sweat." said Tim Spector, a genetic epidemiologist who led the study, in a telephone interview.
The study found people who exercised energetically 3 hours each week had longer telomeres and they were 9 years biologically younger than people who did under 15 minutes.
Spector's team, who also adjusted for body weight, smoking, economic status and physical activity at work, also said moderate（适度的）exercise for 1-2 hours each week provided a four- year advantage.
Studying twins also provided a unique opportunity to judge the effects of exercise on people with the same or similar genetic make-up. the researchers said.
The reason why exercise has this effect is not clear but the researchers said they believe physical activity somehow defends against the natural process called oxidative stress （氧化应激反应）.which damages and kills cells.
1.What is the risk of sedentary lifestyle?
A.It can cause diseases.
B.It can make our cells alive.
C.It can lengthen telomeres.
D.It can keep us fit.
2.What do we know from the text?
A.Exercising can shorten the telomeres.
B.The less exercise, the longer telomeres.
C.Sitting often boils more chromosomes.
D.Telomeres affect human being's ageing.
3.What can cause ageing according to the last paragraph?
A.Cells with diseases. B.Oxidative stress.
C.Genetic structure. D.Physical activities.
4.What is the purpose of the text?
A.To introduce some exercise.
B.To show how to do research.
C.To encourage people to exercise.
D.To advise people to lose weight.
Short-term overseas visitors can now use mobile payments on the Chinese mainland. China's leading mobile payment company Alipay backed by Alibaba announced on Tuesday.
The digital payment giant just introduced an international version of its popular app. designed for overseas travelers to provide them with convenience when paying with their smartphones for shopping, eating and traveling in the Chinese mainland, according to Alipay.
In China, users can have access to services such as paying for taxis and booking hotel rooms and movie tickets directly within the app. However, if a user needs to open the payment function in the app. a local phone number and a Chinese bank account are required, which is inconvenient for short-term international visitors.
Now with the international version of Alipay, there is no more need to open a Chinese bank account. Visitors can use the "Prepaid Card" service provided by the Bank of Shanghai to top up Chinese yuan and enjoy services including scanning a QR code （二维码）to pay at restaurants and shops, as well as making online purchases.
An increasing number of visitors are choosing China as their travel destination, as the country eases visa requirements to promote tourism. In 2018, China welcomed about 30.54 million international visitors to the mainland, a year — on — year increase of 4.7 percent, according to the Ministry of Culture and Tourism.
1.What do we know about Alipay?
A.It offers enough money to consumers.
B.It has shifted its business to China.
C.It has moved its business to the world.
D.It is a new app for mobile payment.
2.Why does Alibaba develop the international version of Alipay?
A.To offer overseas visitors convenience.
B.To help visitors gain a bank account.
C.To promote the company's smartphones.
D.To prove the app is the most popular.
3.What does the underlined words “ceases" probably mean?
A.lowers B.increases
C.raises D.explains
4.What is the writer's attitude to the international version of Alipay?
A.Worried. B.Doubtful.
C.Supportive. D.Indifferent.
A child prodigy （奇才）from Belgium is on course to gain a bachelor's degree at the age of nine. Laurent Simons is studying electrical engineering at the Eindhoven University of Technology （TUE）—a tough course even for students of an average graduate age. Described by staff as “simply extraordinary” Laurent is on course to finish his degree in December. He then plans to work on a PhD program in electrical engineering while also studying for a medicine degree, his father told CNN.
His parents, Lydia and Alexander Simons, said they thought Laurent’s grandparents were overstating （夸大其词）when they said Laurent had a gift, but his teachers soon agreed. "They noticed something very special about Laurent." said Lydia.
Laurent was given test after test as teachers tried to work out the degree of his talents. "They told us he is like a sponge （海绵）said Alexander. While Laurent comes from a family of doctors, his parents have so far not received any explanation as to why their child prodigy has the ability to learn so quickly. But Lydia has her own theory. “I ate a lot of fish during the pregnancy （怀孕）," she joked.
The TUE has allowed Laurent to complete his course faster than other students. “That is not unusual. “said Sjoerd Hulshof education director of the TUE bachelor's degree in electrical engineering, in a statement. ''Special students that have good reasons for doing so can arrange an adjusted schedule. In much the same way we help students who participate in top sport."
1.Who first found Laurent Simons’s talent tor studying?
A.Alexander. B.His teacher.
C.His parents. D.His grandparents.
2.What can best describe Laurent Simons?
A.Brilliant and talented. B.Hardworking but childish.
C.Helpful and friendly. D.Average but clever.
3.What can we know about TUE?
A.It gave Laurent a sport course.
B.It offered Laurent flexible schedule.
C.It stopped Laurent studying further.
D.It treated Laurent as a usual student.
4.What would be the best title for the text?
A.An Important Test B.A Careful Teacher
C.A Gifted Child D.A Vital Course
Florida by Lauren Groff
From the author of "Fates and Furies" comes a collection of short stories exploring the moments that make us feel alive, all based on the landscape, climate, history, and stale of mind of Florida.
The Perfect Couple by Elin Hilderbrand
When the bride-to-be is discovered dead in Nantucket Harbor just hours before the ceremony, everyone in the wedding party is suddenly a suspect, from the best man and the maid of honor to the groom's famous mystery novelist mother.
The Last Time / Lied by Riley Sager
It's just a harmless game, right? The author of "Final Girls'* puts a deadly twist on ''two truths and a lie" as successful artist Emma revisits her dark past, the one night at summer camp that still appears in her memories and her paintings.
Rust and Stardust by T. Greenwood
Based on the experiences of real-life kidnapping （绑架）victim Sally Homer and her kidnaper, whose story shocked the nation and inspired Vladimir Nabokov to write his controversial and iconic "Lolita,'' this heart-pounding （动人心弦的）story gives a voice to Sally herself.
Thrawn: Alliances by Timothy Zahn
From his first meet with the man who will one day become Darth Vader to his rise to power, Grand Admiral Thrawn proves his reputation as one of the most cunning fighters in the history of the Galactic Empire in this thrilling "Star Wars tale.”
1.If you like to read a detective novel, you may buy .
A.Florida B.The Perfect Couple
C.The Last Time I Lied D.Thrown: Alliances
2.Who wrote a novel depending on real experience?
A.Lauren Groff. B.Elin Hilderbrand.
C.T. Greenwood. D.Timothy Zahn.
3.In which part of a newspaper can this text be probably found?
A.Cartoon. B.Business.
C.Campus life. D.Book review.
假定你是李华，目前在美国一所中学做交换生，得知当地某动物收容所在招募志愿者，你准备申请加入。请根据下面的写作提示，用英语写一篇自荐信。内容包括：
1. 介绍个人情况；
2. 具备的一些优势；
3. 希望被录用。
注意：
1. 词数100左右；
2. 可以适当增加细节，以使行文连贯；
3. 结束语已为你写好。
Dear Sir/Madam,
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
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：在错的词下划一横线，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。
Last week, we were attracted by the announcement, say all the school clubs would gather on the sports field during the lunch break on Monday afternoon and that we could join in the club we like. Everyone was excited about it. After lunch, we run onto the sports field. I was amazed with the number and various of the clubs: the Cartoon Club, the Guitar Club, the Basketball Club and so on. It was not easy make a choice. But I decided to become a member of the Guitar Club, so I love music. I signed up and so did some other students which shared my interest. I believe music and new friends will make your life more interestingly.
