Even if we have an extremely healthy diet and lifestyle, the human body is programmed to wear out at a maximum of about 120 years, and usually less. We all have a biological clock inside us which determines the moment when our organs cease to function properly. This is because our cells have stopped renewing themselves and our body can no longer repair itself. This is also the moment when we are more likely to begin to suffer from the diseases of old age such as arthritis and Alzheimer’s. However, rapid advances in DNA research are beginning to throw light on the secrets of the ageing process. By the end of this century we could literally have the power of life over death.
Although it has long been accepted that humans have a fixed lifespan, it is also a fact that certain other organisms, such as reptiles and amphibians, appear to live indefinitely. The only reason we do not see 500-year-old alligators is because in the wild their lives are always in danger, from man, from pollution and from other animals. When they are kept in zoos they do not seem to age at all after they are fully grown. The same is true of some species of fish, which grow indefinitely and show no signs of ageing. The existence of animals with no fixed lifespan seems to indicate that an age gene really does exist. It is this gene which scientists are searching for, which may delay or repair damage to the body caused by ageing.
Another new area of research involves the oxidation（氧化） theory, which says that ageing is caused by the same process that makes iron rust. In controlled experiments, the lifespans of certain animals were shown to be lengthened with anti-oxidants; for example, the lifespan of mice can be increased by 30%. Antioxidants are already being used in face creams and other cosmetics, and they are likely to play an important part in keeping people physically young.
Perhaps the most immediate advance we are likely to see in the battle to halt（停止）the ageing process will be organ replacement. By the year 2020 it is likely that we will be replacing injured bones or even organs like livers and kidneys with ones “grown” in laboratories. By 2050 perhaps every organ in the body, except the brain, will have become commercially available. Recent experiments also show that it may one day be possible to “grow” new organs inside our body to replace worn-out ones, something which lizards and alligators already do.
Suddenly immortality（不死，不朽） seems within reach. We can begin to imagine a future where we are born, we grow to maturity, but we never grow old and die. But do we really want to live forever?
【小题1】 When all humans reach a certain age,         .

When someone steps on your toe by accident, you will hurt plenty．But it hurts even more, if you think the person does the same thing on purpose．Earlier studies have found that the feeling of pain can change with how it is experienced．That is why giving people sugar pills and saying they are medicine can make them feel better．

This study examined whether self-reported pain is indeed higher when the events producing the pain are understood as intentionally caused by another person．For the study, the researchers told 40 volunteers that they were going to do a series of tasks, including color matching, number counting and discomfort assessment．This last task involved their receiving a brief electric shock to the wrist．They were told that a partner, sitting in another room, would choose which task they would do, and a computer screen helped them to know their partner’s choice．

In some cases, the volunteers were told their partner had chosen the pain tolerance test．In others, they were told the computers would select the pain tolerance test regardless of their partner’s choice．When volunteers thought that their partners were making the shocks on them on purpose, the feeling made the pain worse．As a matter of fact, they were the same．

This study provides evidence that the experience of pain changes depending upon how they think when people have been harmed．Specifically, the meaning of a harm — whether it was intended — influences the amount of pain it causes．So, although a broken toe may hurt, an intentionally broken toe should hurt more．

It can be concluded from the text that _______．

A．the feeling of pain varies from one person to another k+s-5#u 

B．long-lasting pain damages people’s health

C．pain is greater if harm seems to be intentionally done

D．people suffer more from accidental pain

What can we infer from the text?

A．People can reduce pain by relaxing．

B．Researchers study how pain is caused．

C．Everyone should know the effect of pain．

D．People should think more about pain．

What does the underlined word “they” in the third paragraph refer to?

A．Volunteers．               B．Computers．  

C．Shocks．           D．Pains．

What’s the author’s attitude to the result of the study? k+s-5#u 

A．Indifferent．                B．Sceptical．   

C．Disapproving．     D．Approving．

    When I was a child, I often dreamed of the time when I could leave home and escape to the city. We lived on a small farm and it was very difficult for us to know what was happening outside the small farm, especially in the winter when we were quite cut off from the outside world. As soon as I left school, I packed my bags and moved to the capital. However, I soon discovered that city life has its own problems, too.

    One big disadvantage is money. It costs so much to go out, not to mention basic needs like food and housing. Another disadvantage is pollution. I suffer from a disease that makes breathing very difficult and the air is so bad that I am afraid to go outside as I like, even in the summer. Then there is the problem of traveling round. Although I have a car, I seldom use it because of the traffic jams. One choice is to go by bicycle, but that can be quite dangerous.

    Of course there are advantages. First, there is so much to do in the city, whatever you taste in culture or entertainment. Besides, there are wonderful jobs and greater chances of moving to a more important job or position. Finally, if you like shopping, the variety (多样性) of goods is very surprising—and, what is more, shops are often only a short walk away.

Is life better then, in the city? Perhaps it is, when you are in your teens or twenties. However, as you get older, and especially if you have small children, the peace of the countryside may seem preferable. I certainly hope to move back there soon.

56. What was the writer always thinking about when he was a child?

   A. Staying on the farm.

   B. Moving to the countryside.

   C. Leaving home for the city.

   D. Running away from the school.

57. What can we learn from the text?

   A. The writer is very old now.                    B. The writer is in good health.

   C. The write prefers driving a car.                  D. The writer lives in the city now.

58. In the passage, the writer tries to __________.

   A. express his opinions about way of life      

   B. describe his life in the countryside

   C. show an interest in the outside world

   D. persuade the reader to live in the city

59. How is the passage mainly developed?

   A. By questioning.                                             B. By comparing.

   C. By listing examples.                                       D. By giving explanations.

When a storm is coming, most people leave the area as quickly as possible and head for safety…But there are a few people who will get into their cars and go straight for the center of the storm．These people are willing to risk being killed by floods or 100-Kilometer- an-hour winds for the excitement of watching the storm close up．
　 “Storm chasing (追逐)”is becoming an increasingly popular hobby，especially in the Midwest of the United States, where there are frequent storms between March and July．A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to l,000 kilometers to where the storm will be and waits for it to develop．
　  Although anyone can do it，storm chasing is extremely dangerous．The power of a big storm  can throw a cow into the air or destroy a whole house in seconds．Storm chasers are also often hurt in accidents caused by driving in a heavy rain．If you are a beginner, it is much safer to join a group for storm - chasing vacations during the storm season．
　  Even then，storm chasing is not all adventure and excitement．“Storm chasing is 95％driving，”says Daniel Lynch，who spends most of his summer storm-chasing．“Sometimes you
Can sit around for hours waiting for something to happen，and all you get is blue sky and a few light showers.”
　  However，for storm chasers，it is all worth it. “When you get close to a storm，it is the most exciting sight you will ever see in your life，”says Jasper Morley．“Every storm is an example of the power of nature．It is the greatest show on Earth．”
【小题1】For storm chasing，the first thing storm chasers do is to　　　 ．

   
D
When a storm is coming, most people leave the area as quickly as possible and head for safety…But there are a few people who will get into their cars and go straight for the center of the storm．These people are willing to risk (冒…危险) being killed by floods or 100-Kilometer- an-hour winds for the excitement of watching the storm close up．
“Storm chasing (追逐)”is becoming an increasingly popular hobby (喜好) ，especially in the Midwest of the United States, where there are frequent storms between March and July．A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to l,000 kilometers to where the storm will be and waits for it to develop．
Although anyone can do it，storm chasing is extremely dangerous．The power of a big storm  can throw a cow into the air or destroy a whole house in seconds．Storm chasers are also often hurt in accidents caused by driving in a heavy rain．If you are a beginner, it is much safer to join a group for storm - chasing vacations during the storm season．
Even then，storm chasing is not all adventure and excitement．“Storm chasing is 95％driving，”says Daniel Lynch，who spends most of his summer storm-chasing．“Sometimes you
Can sit around for hours waiting for something to happen，and all you get is blue sky and a few light showers.”
However，for storm chasers，it is all worth it. “When you get close to a storm，it is the most exciting sight you will ever see in your life，”says Jasper Morley．“Every storm is an example of the power of nature．It is the greatest show on Earth．”
57．For storm chasing，the first thing storm chasers do is to       ．
A．head straight for the center of the storm   
B．get into the car for safety
C．wait patiently for the storm to develop
D．collect information about a coming storm
58．Beginners of storm chasing are advised_______
A．not to drive in a heavy rain   
B．to do it in an organized way
C．not to get too close to a storm
D．to spend more time on it in summer
59．By saying“it is all worth it”in the last paragraph，the author means that______
A．storm chasing costs a lot of money
B．storm chasing is worth hours of waiting
C．efforts in storm chasing are well paid
D．a storm presents the greatest show on Earth
60．What can we learn from the text?
A．Sometimes storm chasers get nothing but disappointment． 
B．Many storm chasers get killed in the storms．
C．Storm chasing is becoming popular around the world．
D．Storm chasing is only fit for young people