The Coalition for the Homeless is an organization that seeks to address the needs of the homeless population in the United States. It is a network of offices, some of which provide food and houses for the homeless population, and some of which fight for the passing of laws that would give every American the right to a place to call home. According to the Coalition’s studies, of over two hundred million people living in th U?ited States, up to three million are homeless—and the number is still growing. Since the late 1970s, fast-rising house prices, large cuts in government supported housing programs, and economic recession(经济衰退) have made it impossible for many Americans to meet housing costs. Sadly, this has resulted in a number of persons being forced to leave their homes and/or unable to find new affordable homes.According to another research, families with children appear to be the fastest-growing part of the homeless population, making up 39% of it. The old idea of a homeless person, that of the single man who gets drunk all the time, is no longer true. A much larger part of the population now finds itself homeless. Even worse, once a person becomes homeless, he often finds it impossible to find a job, since most employers require anyone who wants a job from them to provide a home address on a job application.

1. The word “address” in the first line probably means 　　　　 .

A. talk about　　　 B. deal with　　　 C. fight for　　　 D. write to

2. How many people are homeless in the U.S. according to the Coalition studies?

A. 39% of the population.　　　　　　　　 B. 200 million people.

C. About 3 million people.　　　　　　　　 D. About one-fifth of the population.

3. Homeless people often have difficulty finding a job because________.

A. they have no home addresses

B. they mostly have a drinking problem

C. they aren't supported by government programs

D. they often don't have enough work experience

4. What is the main cause of the rising number of the homeless in the U.S.?

A. The passing of new housing laws.

B. The fast growth of family size.　　　　　　　　　　　　　　

C. The slow construction of houses.

D. The ever-rising price of housing.

He drew the picture quite  　　　the others.

A.different from　　　　　　　　　　　　　B.different with

C.differently from　　　　　　　　　　　　D.differently with

She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121st birthday.

　　    When it comes to long life, Jeanne Calment is the world’s recordholder. She lived to the ripe old age of 122. So is 122 the upper limit to the human life span（寿命）? If scientists come up with some sort of pill or diet that would slow aging, could we possibly make it to 150－or beyond?

　　    Researchers don’t entirely agree on the answers. “Calment lived to 122, so it wouldn’t surprise me if someone alive today reaches 130 or 135, ”says Jerry Shay at the University of Texas.

　　    Steve Austad at the University of Texas agrees. “People can live much longer than we think, ”he says. “Experts used to say that humans couldn’t live past 110. When Calment blew past that age, they raised the number to 120. So why can’t we go higher? ”

　　    The trouble with guessing how old people can live to be is that it’s all just guessing. “Anyone can make up a number, ”says Rich Miller at the University of Michigan. “Usually the scientist who picks the highest number gets his name in Time magazine. ”

　　    Won’t new anti-aging techniques keep us alive for centuries? Any cure, says Miller, for aging would probably keep most of us kicking until about 120. Researchers are working on treatments that lengthen the life span of mice by 50 percent at most. So, if the average human life span is about 80 years, says Miller, “adding another 50 percent would get you to 120. ”

　　    So what can we conclude from this little disagreement among the researchers? That life span is flexible（有弹性的）, but there is a limit, says George Martin of the University of Washington. “We can get flies to live 50 percent longer, ”he says. “But a fly’s never going to live 150 years. ”Of course, if you became a new species （物种）, one that ages at a slower speed, that would be a different story, he adds.

　　    Does Martin really believe that humans could evolve （进化）their way to longer life? “It’s pretty cool to think about, ”he says with a smile.

1. What does the story of Jeanne Calment prove to us?

A．People can live to 122.

B．Old people are creative.

C．Women are sporty at 85.

D．Women live longer than men.

2. According to Steve Austad at the University of Texas, ______.

A．the average human life span could be 110

B．scientists cannot find ways to slow aging

C．few people can expect to live to over 150

D．researchers are not sure how long people can live

3. Who would agree that a scientist will become famous if he makes the wildest guess at longevity?

A．Jerry Shay.　                           B．Steve Austad

C．Rich Miller　                           D．George Martin

4. What can we infer from the last three paragraphs?

A．Most of us could be good at sports even at 120.

B．The average human life span cannot be doubled

C．Scientists believe mice are aging at a slower speed than before.

D．New techniques could be used to change flies into a new species