Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunityand resistance in humans, the scientists said.?“We wanted 题目和参考答案——青夏教育精英家教网—

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Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunity(免疫)and resistance in humans, the scientists said.?
“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits, such as immunity,” said Robin May of the University of Birmingham, who led the study.?
Populations across the world are aging at a surprising pace, bringing potentially big challenges for health and social care systems. A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays. Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.?
“What we have found is that things like resistance and aging tend to go hand in hand,” May said in an interview.?
May’s team compared longevity, stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAF-16 in each of the four species, and found that they were all quite distinct.?
May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes, which scientists believe play a role in the aging process.?
“The fact that subtle（微妙的）differences in DAF-16 between species seem to have such an impact on aging and health is very interesting and may explain how differences in lifespan and related traits have arisen during evolution,” May said.?
71. In which section may the text appear in a newspaper? ?
A. Education. B. Science. C. Entertainment. D. Culture.
72. According to May_________,.?
A. resistance has a lot to do with aging?
B. FOXO genes can be found in worms?
C. genes play the same role in different species?
D. new drugs will change the genes in older people
73. What can we know from the third paragraph??
A. New ways have been found to affect aging. ?
B. Babies in the rich world will all live longer. ?
C. Present social care systems are poorly managed.?
D. Aging populations are causing more challenges.
74. From the text we know that DAF-16.?
A. is a gene that is only found in worms?
B. can make people live longer?
C. has an effect on aging and immunity?
D. has been quite familiar to scientists
75. What can be the best title of the passage??
A. Scientists Find Gene Linked to Aging?
B. Population Aging Faster than Expected?
C. How to Make People Live Longer?
D. Gene Determines How Long We Live

?71—75 BADCA

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阅读下面短文，根据以下要求：1）汉语提示；2）首字母提示；3）语境提示, 在每个空格内填入一个适当的英语单词，所填单词要求意义准确、拼写正确。（每题1分；共10分）

All the students present, may I have your attention, please? I'm Elizabeth Taylor. As editor of the Voice, I'd like to i___1.__ you to our school newspaper. We need new hands to help us ___2.___ can tell the students what's new every day through our newspaper. Experience isn’t quite necessary, but writing and typing skills are in great ?? 3.? . We need people to read our ___4.___（文章）to type and check them. We could also use a good photographer and several engineers. Since the voice comes ?? 5.? ? five days a week, we need good students who know how to make the ___6.__ of their time. There’s some money for salaries d___7.___ on how much work to do, but don't expect to get rich, this isn’t something you do for money. Mostly it's just for fun. Anyone who’s w___8.___ to joining us should speak to me ___9.___（立刻）after this meeting. Be p___10.___ to start right away. Our first paper appears tomorrow.

When Frida Kahlo's paintings were on show in London, a poet described her paintings as “ a ribbon （丝带）around a bomb”. Such comments seem to suggest Kahlo had a big influence on the art world of her time. Sadly, she is actually a much bigger name today than she was during her time.

Born in 1907 in a village near Mexico City , Kahlo suffered from polio（小儿麻痹症）at the age of seven. Her spine （脊柱）became bent as she grew older. Then, in 1925, her back was broken in several places in a school-bus accident. Throughout the rest of her life, the artist had many operations, but noting was able to cure the terrible pain in her back. However, the accident had an unexpected side effect. While lying in her bed recovering, Kahlo taught herself to paint.

In 1929, she got married to Diego Rivera, another famous Mexican artist. Rivera’s strong influences on Kahlo’s style can be seen in her early works, but her later works from the 1940s, known today as her best works, show less influence from her husband.

Unfortunately, her works did not attract much attention in the 1930s and1940s, even in her home country. Her first one-woman show in Mexico was not held until 1953. For more than a decade after her death in 1954, Kahlo’s works remained largely unnoticed by the world, but in the 1970s her works began to gain international fame at last.

1.What does the phrase “a much bigger name” in paragraph 1 most nearly mean?

A．a far better artist B．a much more famous person

C．a much stronger person D．a far more gifted artist

2.The terrible pain Kahlo suffered was caused by .

A．back injuries B．her bent spine C．polio D．the operations she had

3.Kahlo’s style had become increasingly independent since the .

A．1930s B．1970s C．1950s D．1940s

4.What is author’s attitude toward Kahlo?

A．Devotion B．Encouragement C．Worry D．Sympathy（同情）

Recently, one of my best friends, whom I've shared just about everything with since the first day of kindergarten, spent the weekend with me. Since I moved to a new town several years ago，we've both always looked forward to the few times a year when we can see each other.

Over the weekend, we spent hours and hours, staying up late into the night, talking about the people she was hanging around with. She started telling me stories about her new boyfriend, about how he experimented with drugs and was into other selfdestructive（自我毁灭的） behavior. I was blown away! She told me how she had been lying to her parents about where she was going and even stealing out to see this guy because they didn't want her around him. No matter how hard I tried to tell her that she deserved better, she didn't believe me. Her selfrespect seemed to have disappeared.

I tried to convince her that she was ruining her future and heading for big trouble. I felt like I was getting nowhere. I just couldn't believe that she really thought it was acceptable to hang out with a group of losers, especially her boyfriend.

By the time she left，I was really worried about her and exhausted by the experience. It had been so frustrating，I had come close to telling her several times during the weekend that maybe we had just grown too far apart to continue our friendship, but I didn't. I put the power of friendship to the final test. We'd been friends for far too long. I had to hope that she valued me enough to know that I was trying to save her from hurting herself. I wanted to believe that our friendship could conquer anything.

A few days later, she called to say that she had thought long and hard about our conversation, and then she told me that she had broken up with her boyfriend. I just listened on the other end of the phone with tears of joy running down my face. It was one of the truly rewarding moments in my life. Never had I been so proud of a friend.

1.In the writer's opinion，her friend ________.

A．was a girl with no selfrespect

B．could find a better boyfriend

C．was brave enough to stick to her own choice

D．didn't value the writer's suggestion

2.What did the writer worry about?

A．She would lose the friendship with her.

B．Her friend's parents would be worried about their daughter.

C．Her friend would get into great trouble with the boy.

D．Her friend's boyfriend would be in great trouble.

3.We may learn from Paragraph 3 that the writer________.

A．didn't want to go anywhere else

B．understood her friend's hanging with her boyfriend

C．couldn't believe that her friend's choice was acceptable

D．doubted that she could in any way help her friend

4.What can be concluded from the passage?

A．Friendship starting from childhood is not reliable.

B．Friendship is a cure for any injury in life.

C．Friendship should be everlasting once begun.

D．Friendship can have magical power in life.

Today, as in every other day of the year, more than 3,000 US adolescents (少年) will smoke their first cigarette on their way to becoming regular smokers as adults.During their lifetime, it can be __1__ that of these 3,000 about 23 will be murdered, 30 will die in traffic __2__， and nearly 750 will be killed by a smokingrelated disease.The number of deaths __3__ by cigarette smoking outweigh all other factors, whether __4__ or involuntary, as a cause of death.Since the late 1970s, when daily smoking among high school seniors __5__ 30%, smoking rates among __6__ have declined.While the decline is impressive, several important issues must be __7__.First, in the past several years, smoking rates among youth have __8__ very little.Second, in the late 1970s, smoking among __9__ high school seniors exceeded(超过) that among female by nearly 10%.The statistic is reversing.Third, several recent studies have __10__ that high school dropouts(辍学者)have excessively __11__ smoking rate, as much as 75%.Finally, though significant declines in adolescent smoking have __12__ in the past decade, no definite __13__ for the decline to exist.Within this context, the National Cancer Institute (NCI) began its current __14__ to take the most effective measures to __15__ smoking level among youth.

1. A．inferred B．believed C．expected D．hoped

2. A．peaks B．accidents C．problems D．jams

3. A．damaged B．caused C．led D．made

4. A．happy B．healthy C．voluntary D．crazy

5. A．had B．totaled C．got D．reached

6. A．youth B．students C．girls D．boys

7. A．raised B．lifted C．asked D．questioned

8. A．grown B．changed C．risen D．declined

9. A．old B．male C．young D．female

10. A．insisted B．indicated C．denied D．wondered

11. A．large B．small C．high D．low

12. A．sunk B．set C．produced D．occurred

13. A．reasons B．causes C．ways D．results

14. A．survey B．study C．figure D．effort

15. A．stop B．reduce C．forbid D．limit

My colleague has been recovering gradually since the operation, and it wont’ be long ______ he comes back to work．

A．before

B．since

C．after

D．when

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