D
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

Body and Food
Your body, which has close relations with the food you eat, is the most important thing you own, so it needs proper treatment and proper nourishment (营养).The old saying “An apple a day keeps the doctor away ”is not as silly as some people think. The body needs fruit and vegetables because they contain vitamin C. Many people take extra vitamins in pill form, believing that these will make them healthy.
But a good diet is made up of nourishing food and this gives all the vitamins you need. The body doesn’t need or use extra vitamins, so why waste money on them?
In the modern western world, many people are too busy to bother about eating properly. They throw anything into their stomachs, eating hurriedly and carelessly. The list of illnesses caused or made worse by bad eating habits is frightening,
【小题1】“Your body has close relations with the food you eat.” It really means that ______.

One of our biggest fears nowadays is that our kids might some day get lost in a “sea of technology”rather than experiencing the natural world.Fear-producing TV and computer games are leading to a serious disconnect between kids and the great outdoors,which will change the wild places of the world,its creatures and human health for the worse,unless adults get working on child’s play.
Each of us has a place in nature we go sometimes,even if it was torn down.We cannot be the last generation to have that place.At this rate,kids who miss the sense of wonder outdoors will not grow up to be protectors of natural landscapes.“If the decline in parks use continues across North America,who will defend parks against encroachment(蚕食)？”asks Richard Louv,author of Last Child in the Woods.
Without having a nature experience,kids can turn out just fine,but they are missing out a huge enrichment of their lives.That applies to everything from their physical health and mental health,to stress levels,creativity and cognitive(认知的)skills.Experts predict modern kids will have poorer health than their parents—and they say a lack of outside play is surely part of it:research suggests that kids do better academically in schools with a nature component and that play in nature fosters(培养)leadership by the smartest,not by the toughest.Even a tiny outdoor experience can create wonder in a child.The three-year-old turning over his first rock realizes he is not alone in the world.A clump of trees on the roadside can be the whole universe in his eyes.We really need to value that more.
Kids are not to blame.They are over-protected and frightened.It is dangerous out there from time to time,but repetitive stress from computers is replacing breaking an arm as a childhood rite(仪式)of passage.
Everyone from developers,to schools and outdoors’ citizens,should help regain for our kids some of the freedom and joy of exploring,taking friendship in fields and woods that cement(增强)love,respect and need for the landscape.As parents,we should devote some of our energies to taking our kids into nature.This could yet be our greatest cause.
【小题1】The main idea of Paragraph 2 is that_______.

Special Bridges Help Animals Cross the Road
——Reported by Sheila Carrick
Why did the chicken cross the road? To get to the other side.
Most people know this joke. But recently, some people have been much more worried about how the grizzly bear and mountain lion can cross the road.
“Millions of animals die each year on U.S. roads,” the Federal Highway Administration reports. In fact, only about 80 ocelots, an endangered wild cat, exist in the U.S. today. The main reason? Roadkill.
“Ecopassages” may help animals cross the road without being hit by cars. They are paths both over and under roads. “These ecopassages can be extremely useful, so that wildlife can avoid road accidents,” said Jodi Hilty of the Wildlife Protection Society.
But do animals actually use the ecopassages? The answer is yes. Paul Beier of Northern Arizona University found foot marks left by mountain lions on an ecopassage that went under a highway. This showed that the lions used the passage.
Builders of ecopassages try to make them look like a natural part of an area by planting trees on and around them. Animals seem to be catching on. Animals as different as salamanders and grizzly bears are using the bridges and underpasses.
The next time you visit a park or drive through an area with a lot of wildlife, look around. You might see an animals overpass!
1. The writer uses the example of “ocelots” to show that ______.
A. wild animals have become more dangerous
B. the driving conditions have improved greatly
C. the measure for protecting wildlife fails to work
D. an increasing number of animals are killed in road accidents
2. From the news story, we know an ecopassage is ______.
A. an underground path for cars                                  
B. a fence built for the safety of the area
C. a bridge for animals to get over a river                    
D. a pass for animals to cross the road
3. When the writer says that animals seem “to be catching on”, he means ______.
A. animals begin to realize the dangers on the road 
B. animals begin to learn to use ecopassages
C. animals are crossing the road in groups                    
D. animals are increasing in number
4. The writer asks visitors and drivers to look around when traveling because ______.
A. wild animals may attack cars                                  
B. wild animals may jam the road
C. they may see wild animals in the park               
D. they may see wild animals on ecopassages

Music is an international language. The songs that are sung or played by instruments are beautiful to all people everywhere.
Popular music in America is what every student likes. Students carry small radios with earphones and listen to music before class, after class, and at lunch. Students with cars buy large speakers and play the music loudly as they drive on the streets.
Adult drivers listen to music on the car radio as they drive to work. They also listen to the news about sports, the weather, politics, and activities of the American people. Most of the radio broadcast is music.
Pop or popular music singers make much money. They make a CD or tape which radio stations use in every state. Once the popular singer is heard throughout the country, young people buy his or her tapes. Some of the money from these tapes comes to the singer. Wherever the singer goes, all the young people want to meet him or her. Now the singer has become a national star. 
There are other kinds of music that are important to Americans. One is called folk music. It tells stories about the common life of Americans. Another is called western or country music. This was started by cowboys who would sing at night to the cows they were watching. Today, any music about country life and the love between a country boy and his girl is called western or country music.
Serious music for the concert halls is called classical music. Music for instruments is called orchestra music (管弦乐), such as the symphonies (交响乐) of Beethoven. There is opera (歌剧) for singers. There is ballet (芭蕾舞剧) for dancers like the story of Liang Shanbo and Zhu Yingtai in China?
67. What can we know about music and people in America?
A. Student drivers carry small radios with earphones when they drive on the streets.
　    B. Students always listen to music before class, after class and at lunch.
　    C. Adult drivers only listen to news except music when they drive to work.
D. Adult drivers never listen to music when they drive to work.
68. How many kinds of music are mentioned in the passage?
　　       A. Six.                    B. Eight.     C. Five.                      D. Seven.
69. Country music ______.
　　 A. is a kind of music that is popular in America
　　 B. has nothing to do with folk music        
C. is only sung by cowboys
　　 D. is not played in the concert halls
70. Which of the following is TRUE according to the passage?
　　      A. All people in America like popular music.
　　      B. Pop singers can get all the money from the tapes.
　　      C. Now, western or country music is a little different from its beginning.
　　      D. Liang Shanbo and Zhu Yingtai is a kind of pop music.