A new international study shows that some people's biological clock plays a powerful role for their life expectancy, regardless of lifestyle choices.

Published in the latest issue of Aging on Wednesday, the study has found the most definitive evidence to explain why some people keep healthy lifestyle but die younger than others.

Geneticist Steve Horvath from the University of California, Los Angeles (UCLA), led a team of 65 scientists around the world to record age-related changes to human DNA, analyse blood samples collected from 13, 000 people and estimate their lifespan.

A higher biological age, regardless of actual age, consistently predicts an earlier death, the study says.

"You get people who are vegan, sleep 10 hours a day, have a low-stress job, and still end up dying young," Horvath said in a statement. "We have shown some people have a faster innate aging rate."

The findings discovered that 5 percent of the population ages at a faster biological rate, which translated to a roughly 50 percent higher than average risk of death at any age.

"The great hope is that we find anti-aging interventions that would slow your innate aging rate," Horvath said, adding that "this is an important milestone to realizing this dream."

1.Some people keep healthy lifestyle but die younger than others because ________.

A. their biological clock is not powerful enough

B. the most definitive evidence has been found

C. they have a higher actual age than others

D. they ages at a relatively faster biological rate

2.How was the study conducted?

A. By collecting and analyzing data.

B. By interviewing lots of people.

C. By researching previous studies.

D. By studying different lifestyles.

3.According to the study, it can be inferred that ________.

A. people who keep healthy lifestyle tend to live longer

B. people’s lifespan can be predicted by their age

C. 5 percent of people are believed to have a faster innate aging rate

D. anti-aging interventions have proved to slow the innate aging rate

4.Which of the following would be the best title for the passage?

A. We all should keep healthy lifestyle

B. Geneticist finds anti-aging interventions

C. Biological clock predicts life expectancy

D. Horvath builds an important milestone

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短文改錯(cuò)

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刪除：把多余的詞用斜線(\)劃掉。

修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出修改后的詞。

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Li Hua and Wang Hai are students of Senior One. They all work hard but have different learning methods. Li Hua listens to her teachers attentive and tries to catch everything the teachers say. She spends more time doing her homework. It is certain what she can go to bed earlier and always keeps energetic in the day.

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The Science of Risk-Seeking

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科目：高中英語 來源：2017屆吉林長(zhǎng)春外國(guó)語學(xué)校高三上期末考試英語試卷（解析版） 題型：語法填空

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科目：高中英語 來源：2017屆北京西城區(qū)高三上期末考試英語試卷（解析版） 題型：閱讀理解

When the telephone rings late at night, most women guess it must be one of only four or five people calling. A sister?Maybe.An emergency?Possibly.A mother?Probably not at that time of night. Much more probably it is a close female friend calling to tell you that she has split up with her boyfriend again or perhaps simply that a good movie has just started on TV.

At a time when families are spread far and wide and marriages often end in divorce, friendships are becoming more and more important. Erika, a 32-year-old lawyer, is strengthened by her ten-year friendship with her married friend Jane. “I was very sick one night, so I called Jane at about 3:00 a.m. to talk about it,” she says. “She was very supportive and even came over to take me to the doctor’s the next morning.”

As American TV shows like Friends, which follows the lives of a very close group of young friends, have become more popular, many of us are beginning to see the value of such friendships. TV shows like this tell us that our romantic relationships may not last, but we need to keep in touch with our close friends if we want to survive.

A TV show called Real Women is about the lives and relationships of five former school friends. In this show, family, husbands, and work are all less important than friendships. One of its actresses says the show reflects her own experience. “Friendship is about commitment. I don’t see some of my friends for ages but when we get together, it is as if time hasn’t passed.”

This is true of Erika and Jane’s friendship. With Erika’s family 200 miles away, it is Jane who keeps a spare set of keys to Erika’s apartment and waters her plants whenever she is away. “Having Jane around gives me a certain amount of freedom. It is not the kind of thing that you could ask anyone to do, but she knows I would do the same for her.” Erika feels that because she no longer sees her family every day, she now enjoys a closer relationship with her best friend. Jane, who may move to a different city soon, is worried about leaving such a support system of friends. “My friends have more to do with my life than my parents and, therefore, I don’t have to spend a lot of time explaining things to them. Friends are more up to date with what is happening.”

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2.TV shows like Friends tell us that ________.

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B. families and work are as important as friends

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D. friendship fades as time goes by

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B. have been friends for 32 years

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D. trust and support each other in daily life

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A. A near friend is more helpful than a faraway relative.

B. Both marriage and friendship demand commitment.

C. However far away we’re, parents worry about us.

D. Long distance makes the hearts closer.

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