We have met the enemy and he is ours We bought him at a pet shop. When monkey-pox, a disease usually found in the African rain forest suddenly turns up in children in the American .Midwest it’s hard not to wonder of the disease that comes from foreign animals is homing in on human beings. “Most of the infections (感染)we think of as human infections started in other animals “ says Stephen Morse director of the Center for Public Health Preparedness at Columbia University.

It’s not just that we’re going to where the animals are; we’re also bringing them closer to us Popular foreign pets have brought a whole new disease to this country A strange illness killed Isaksen’s pets and she now thinks that keeping foreign pets is a bad idea “I don’t think it’s fair to have them as pets when we have such a limited knowledge of them “says Isaksen

“Laws allowing these animals to be brought in from deep forest areas without stricter control need changing “says Peter Schantz Monkey-pox may be the wake-up call. Researchers believe infected animals may infect their owners. We know very little about these new diseases A new bug(病毒)may be kind at first. But it may develop into something harmful(有害的)Monkey-pox doesn’t look a major infectious disease But is not impossible to pass the disease from person to person

We learn from Paragraph I that the pet sold at the shop may_______.

A.come from Columbia

B.prevent us from being infected

C.enjoy being with children

D.suffer from monkey-pox

Why did Isaksen advise people not to have foreign pets?

A.They attack human beings

B.We need to study native animals

C.They can’t live out of the rain forest

D.We do not know much about them yet

What does she phrase “the wake-up call” in paragraph 3 most probably mean?

A.a new disease

B.a clear warning

C.a dangerous animal

D.a morning call

The text suggests that in the future we               .

A. may have to fight against more new diseases

B. may easily get infected by diseases from dogs

C. should not be allowed to have pets

D. should stop buying pests from Africa


Good manners play an important part in maintaining(保持)peace in society. A man with good manners doesn’t hurt others’ feelings, and therefore he’s on good terms with everyone. In this way he helps to keep the peace in society.
But a man with bad manners has no respect for others. He uses words carelessly and behaves rudely towards others and causes a lot of unpleasantness. In the end, he himself will suffer the most. Everyone avoids him and he is forced to live alone.
To live well in society, money alone is not enough. Even the richest man cannot afford to have bad manners. He may have enough money to buy all things he wants; but if his manners are bad, he will have no friends, and no one can live happily without friends.
We should have good manners, for it’s human nature to try to get friendship; and friendship has to be earned (获得)through our own attitude towards others. If we are kind to others, they will be kind to us, and kindness is the most basic quality of good manners. Bad manners drive away friends as well as our own family members.
On the other hand, a man with good manners has many friends. He commands the respect of all those who come into contact(联系)with him. He doesn’t talk ill about others. Even when he’s provoked, he tries his best not to upset others. He also feels sorry about the weak and the disabled.
There are, however, many people who behave so well outside their homes that they are respected by everyone outside. But in their own homes they are worse than the devil(魔鬼). Such people cannot be said to have good manners. Their behavior will soon be discovered by others.
If one’s manners are good, one behaves well everywhere, even when one is away from the critical(爱挑剔的)eyes of others. Only such a person can live well in society.
【小题1】People with good manners bring society _____.

A.peaceB.enjoymentC.respectD.friendship
【小题2】What does the author mainly want to tell us in Paragraph 4 ?
A.People are born friendly.
B.Bad manners make people lose friends.
C.Money is not the most important.
D.Kind people will be treated kindly.
【小题3】The underlined word “provoked” in the passage may mean _____.
A.tiredB.sad `C.made angryD.left alone
【小题4】What’s the main idea of the passage ?
A.Kindness is important.
B.Friendship is important.
C.Good manners are important.
D.People with bad manners can’t live well.

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?

1. When all humans reach a certain age,         .

A.they suffer the effects of their diet and lifestyle

B.the organs stop to perform appropriately

C.their cells continue to renew themselves

D.they develop arthritis and Alzheimer’s

2. The purpose of showing the case of alligators is to prove         .

A.alligators are in danger in the wild because of the threat from man, pollution and other animals

B.it is widely accepted that humans have a fixed lifespan

C.there exists an age gene which may control ageing

D.the age gene damages the body

3.The underlined phrase “live indefinitely” in Paragraph 2 probably mean         .

A.live for a period of time without a fixed end

B.live without a clear aim

C.live in an uncertain way

D.live without being fully grown

4.It can be inferred from Paragraph 4 that         .

A.by 2050 we might have most of our worn-out organs replaced with new ones commercially

B.never can the ageing process be avoided

C.livers and kidneys are sure to be grown in laboratories by the year 2020

D.lizards and alligators grow new organs inside their body to replace worn-out ones

5. What is the main topic of this passage?

A.DNA researches show how our cells renew themselves.

B.Anti-oxidants are likely to play an important part in keeping people young.

C.How our biological clock works?

D.Eternal(永恒的) youth: new developments in anti-ageing research.

6.By saying “But do we really want to live forever”, the author may probably mean         .

A.a future where we are born, we grow to maturity, but we never grow old and die is on its way

B.he is uncertain whether we can live forever

C.it remains to be seen whether immortality is a blessing or a curse

D.immortality is no longer a dream

 

When nature is left alone, a balance is reached among the animals and plants living in one area. But when man starts his work in nature, the balance is likely to be destroyed. He grows a crop and takes it away to eat ;then there are no dead leaves to fall on the ground, holding water while it sinks into the surface, or decaying (腐烂) and adding humus (腐殖质) to the soil. Unless a farmer acts with knowledge and skill, he is therefore most likely to make the land poorer. To take the place of the useful matter in the crops that he removes, he uses some kind of fertilizer (肥料). Chemical fertilizers are of great help, but the waste products of animals and decaying remains of plants should also be put on the land. In some places, it is a habit to burn waste material lying about, but such burning destroys the useful matter in the dead plants. Although the ashes that are left are valuable when put on the land, a better practice is to bury the waste so that it decays and increases the humus in the soil.

In the past, when the world population was much lower than it is now, a man had little difficulty in ordinary times in growing the food that was needed. When a field had been used some years and had become tired, the farmer could move to another place. The tired land then slowly recovered. By and by grasses and other plants would appear on it and its productive power would slowly return to normal through their decay. But nature, left alone, would take a long time to bring back the land to its former state; the length of time required would depend on local conditions, but it might well be ten years.

It is a bad practice to grow the same crop in a field year after year. If the crop is changed, the land will suffer less because it is treated and used in a different way. Different plants have different effects on the soil. Therefore, a change of crop will do less harm than the growing of the same crop year after year and a regular change to grass will do good to the soil. Much will therefore be gained if different crops are grown one after another, a method known as the rotation (轮作) of crops.

1.According to the passage, the land will become poorer (   )

A. if all the dead leaves are cleared away        B. if the humus is increased after the harvest

C. if dead leaves decay in the soil by themselves  D. if waste plant material lying about is buried

2.We can learn from the passage that the tired land has slowly recovered (   )

A. when grasses and other plants appear again

B. when the treatment is given by nature alone

C. after new grasses and other plants have decayed again

D. after nature has been left alone for several months

3.A modern farmer can hardly move to another place as he did before because (   )

A. the productive power of a new field isn't higher than that of an old one

B. there are few free fields left for him to do farming

C. it takes a farmer more than ten years to start farming in a new field

D. there will be too many grasses in a new field to grow crops

4.It is most likely that the author will go on to (   ) in the paragraph following the passage above.

A. introduce other methods of planting crops     B. deal with how to prevent land getting tired

C. start another topic of how to make use of land  D. further explain what the rotation of crops is

 

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 farm, in the winter especially, we wear quite out 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 one big disadvantage is money. It costs so much to go out, not to mention basics like food and housing. Another disadvantage is pollution. I suffer from asthma(哮喘), and  the air is so bad that I am afraid to go outside. Then there is the problem of traveling round. Although I have a car, I seldom use it became 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 tastes in culture or entertainment(娱乐活动). Besides, there are wonderful jobs and greater chances of moving to a more important job or position. Finally, if you like shopping, the variety 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(十几岁)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.

1.

 What was the writer always thinking about when he was a child ?[来源:]

   A. Staying on the farm.                B. Moving to the countryside.

   C. Leaving home for the city.           D. Running away from the school.

2.

Which of the following is true about the writer?

   A. He is very old now.                 B. He is in good health.

   C. He prefers driving a car.             D. He lives in the city now.

3.

 In the passage, the writer tries to __________.

   A. express his opinions about way of life  

B. describe his life in the countryside

   C. an interest in the outside world      

D. persuade the reader to live in the city

4.

 How is the passage mainly developed?

   A. By inferring.  B. By comparing. C. By listing examples. D. By discussing.

 

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