Have you seen Jurassic Park? In this film, scientists use DNA kept for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and more dangerous than expected. That’s nothing more than a fiction.
But could we really clone endangered animals?
To date, the most successful attempt to do so was the cloning of a gaur, a rare ox-like animal from southeast Asia. Scientists used a cow to bring the cloned baby gaur, named Noah. Two days after birth, however, Noah died from a common bacterial infection. Other endangered species that may be cloned include the African bongo antelope (邦戈羚羊), the Sumatran tiger, the cheetah (猎豹), and the giant panda. Next, could we really clone extinct animals?
In theory? Yes. To do this, you need a well-kept source of DNA from the extinct animals such as wool mammoth (毛象), Tasmanian tiger, or even dinosaur, and a closely related species, still living, which could serve as a surrogate mother.
In reality? Probably not. On the one hand, it’s not likely that extinct animals’ DNA could survive undamaged for such a long time. Cloning extinct animals as wool mammoth, Tasmanian tiger, or dinosaur is much more difficult due to the lack of properly well-preserved DNA. On the other hand, for example, a gaur can have a cow as a surrogate mother, definitely not a monkey. But what about an extinct animals as unique as the panda? What species could possibly serve as a surrogate mother?
Cloning presents many exciting possibilities. However, even if extinct animals are brought back, they could not survive in today’s world. Not only do most extinct animals have no habitat to love in, but the other plants and animals they depended on for food may also be gone as well.
1. It can be learned from the text that ________.
A. scientists have cloned the African bongo antelope
B. both the cheetah and the giant panda live in Asia
C. the gaur lives in Asia and is endangered
D. the gaur is an extinct species
2. The underlined words “a surrogate mother” probably refer to a female who -----
A. contributes its eggs to another female B. gives birth to a baby for another female
C. gives birth to a baby of its own D. cannot give birth to a baby
3. The difficulty in cloning an extinct species is the lack of ______.
A. both the well-preserved DNA and plants to live on
B. both the habitat to live in and the well-preserved DNA
C. both habitat to live in and plants to live on
D. both the well-preserved DNA and a surrogate mother
4. In the author’s opinion, it is possible that ______.
A. some extinct species may be cloned, but not survive
B. extinct species may be cloned and easily survive
C. a gaur can have a monkey as a surrogate mother
D. all the extinct species may be cloned
5．Today , have scientists cloned dinosaus?
A .Yes B .No C .A lot D.Only one.
The Pathfinder
When we found him, he
was a sorry sight. His clothes were torn, his hands bleeding. Before we reached
him, we saw him fall. He lay a moment. Then he pulled himself to his feet,
walked unsteadily a few yards through the woods and fell again.
After we got him out, we went back to find the gun that he had thrown down. His tracks showed that for two days he had circled in the forest, within 200 yards of the road. His senses were so dulled by fear and tiredness that he did not hear the cars going by or see the lights at night.
We found him just in time.
This man, like others before him, had simply been frightened when he knew he was lost. What had been a near disaster might have turned out as only a pleasant walk, had he made a few preparations before he stepped from the highway or off a known path.
Whatever sense of direction that a man may have, it’s still largely a question of observation. A skilled woodsman always keeps an eye on his surroundings. He notes that the shape of a mountain, the direction water flows through a swamp, and the way a tree leans across a path. With these in mind, he may be turned around many times, but he is seldom lost.
There are exceptions, of course, and once in a while a man does come across some strange problem that puts him into the “lost” situation. A rainstorm or sudden blizzard may catch him without a compass（指南针）in his pocket. Darkness may find him in a rough area, where travel is dangerous without a light.
When this happens, the normal first reaction（反应）is the fear of being laughed at as a result of his poor knowledge in the woods. He may also be concerned about the inconvenience that he will cause his friends when he doesn’t show up. This false pride may lead him to keep on the move in a false effort to find his way against all difficulties.
The person who thinks ahead is seldom in great danger. He’ll be safe if he observes carefully, thinks ahead, and remains calm.
1 The author suggested that if the man had not been found, he would have __________.
A. been shot by a gun B. become confused
C. been attacked by wild animals D. been in great danger
2. According to the passage, if a person gets lost in the forest, at the very beginning, he would __________.
A. worry about being laughed at
B. push himself to find his way out
C. feel it is convenient to ask for help from his friends
D. be concerned about being frightened by wild animals
3. When a person tries to find his way in the woods, __________ is the most important
A. intelligence B. observation C. direction D. chance
4. The author tells the story of the lost man as an example of people who __________.
A. go into the woods by themselves
B. don’t know how to signal for help properly
C. are frightened when they think they are lost
D. notice everything when stepping from the highway
A German company was
concerned about talks in Moscow trying to sell some 100 million dollars worth
of equipment to a Russian State company. Talks went smoothly but differences
remained. So Martin Bayer himself, the CEO of the German Company, decided to
come to Moscow to head the talks. Besides caring about his business, the CEO
wanted to go to Russia to hunt bears.
Martin Bayer was one of the greatest hunters of our time (and the Russians knew about it). He went to the Sahara more than hundred times and hunted lions, crocodiles; he hunted polar bears in the North Pole and tigers in the rain forests of India. But he had never hunted Russian bears.
So the Russians decided to organize a bear hunt for Mr. Bayer to sweeten the talks. This wasn't a simple task. Some people in the west still believe that bears may be found and seen everywhere in Russian cities just like squirrels may be seen in our back yards. This is not true. The closest place one may find bears in the wild is maybe 2,500 miles away from Moscow. However, a solution was quickly found. The Russian businessmen went to Moscow Circus（马戏团）and for $2,000 bought a very old bear. This bear used to amuse and amaze audiences in many countries for 30 years, but got and looked too old, and was retired.
“Be careful, the Russian bears are very dangerous, and frightening,” they told to Mr. Bayer. “If compared to the Russian bears, your African lions are nothing more than harmless cats.” The bear was brought to a forest 50 miles from Moscow and was left there. Mr. Bayer was told that bears were plentiful in that forest and that many cattle and even people had been eaten in the surrounding villages.
Meanwhile, an 18-year old female drove through the forest on a motorcycle and suddenly saw a bear (no bears had been seen in those places for 200 years). She was frightened, fell, left her helmet and her motorcycle and ran away.
Mr. Bayer was excited and ready to hunt. This could become the most successful part of his extraordinary hunting experience. The next moment Mr. Bayer saw a bear in a helmet driving on a motorcycle through the forest in front of him. The bear had a happy expression on his face, as he was doing something he had been doing in the circus for 30 years: circling on a motorcycle!
Mr. Bayer lives in a private mental institution near Hamburg happily ever after. The equipment was never sold to Russia. It was sold to Iraq instead.
1. Why did the Russians invite Mr. Bayer to hunt bears?
A. Russian bears are famous for their cruelty.
B. They managed to find a bear for hunting.
C. They expected the trade to be successful.
D. There was a bear in Moscow Circus.
2. Why did the Russians say “Be careful, the Russian bears are very dangerous, and frightening”?
A. To tell Mr. Bayer that many people had been killed by bears.
B. To make Mr. Bayer feel the hunting really challenging.
C. To warn Mr. Bayer to mind his safety while hunting.
D. To tell Mr. Bayer that the bear is really dangerous.
3. We can infer from the last paragraph that __________.
A. Mr. Bayer has gone ma
B. the bear injured him badly
C. he has worked in a mental institution since then
D. the trade has gone smoothly between Russian and Iraq
4. Which would be the best title of the passage?
A. Mr. Bayer, a Brave Hunter B. Russian Bears, Dangerous Animals
C. Don’t Hunt in Russia D. Don’t Deal with the Russians
Science is a major topic in our culture. Since it touches almost every field of our life, educated people need at least some knowledge with its structure and operation. They should also have an understanding of the scientific subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific ideas is easier to obtain if one knows something about the things that excite and discourage the scientist.
This book is written for the person whose knowledge with science is not complete; for the person who has been presented with science as a musty（发霉的）storehouse of dried facts; for the person who sees the chief objective of science as the production of tricks; and for the person who views the scientists as some sort of magician. The book can be used to add to a course in any science, to come with any course that attempts to give an understanding of the modern world, or simply to provide a better understanding of science. We hope this book will lead readers to a broader view on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an idea and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. Besides, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies（哲学）that are deep in our culture.
We have tried to present in this book a correct and up-to-date picture of the scientific world and the people who populate it. That population has in recent years come to include more and more women. This increasing role of women is not just the only event but, rather, part of the trend obvious in all parts of society, as more women enter traditionally male-controlled fields and make influential contributions.
We have also tried to make the book entertaining as well as informative. Our method is usually informal. We feel, as do many other scientists, that we shouldn’t take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a cruel and unpleasant way to earn a living.
1. According to the passage, ‘scientific subculture’ means __________.
A. scientific society B. technical groups
C. complex situation D. knowledge system
2. We need to know something about science because __________.
A. scientists have specific scientific ideas
B. science affects almost every field of our life
C. it is easier to understand general characteristics of science
D. it is not easy to understand the things that excite and discourage scientists
3. The book mentioned in this passage is written for readers who __________.
A. are scientists making influential contributions
B. want to have a little understanding of science
C. want to break the male-controlled world
D. have a misunderstanding about science
4 This passage most probably is __________.
A. the review of a book B. the concluding part of a book
C. the information added to a book D. the introduction of a book
5. According to the passage, we can infer that the book probably is __________.
A. interesting B. serious C. realistic D. humorous
We still don’t understand the influence of the mind’s power over the body, nor do we understand why there should be such power. All we can say for certain is that the mind does have power over the body in very many different ways.
If a man is told that he is at the North Pole and he believes what he is told, he’ll show physical signs which suggest that his body is reacting as though he were at the North Pole. He’ll go pale and shiver. When the film Lawrence of Arabia was shown, cinema managers around the world reported that the sales of ice cream rocketed. The endless desert scenes had made the moviegoers feel uncomfortably hot.
Hypnotists use the power of the mind over the body in order to use their influence. The hypnotist must only convince the patient that something is true, and the patient will act accordingly. If he convinces the patient that his arms are as heavy as lead, then the patient will be unable to lift his arms. If he convinces the patient that a piece of ice is a hot iron and he then touches the patient’s skin with the ice, a blister（水泡）will develop. The body will react to the suggestion and not to the reality, and signs of a real burn will appear.
1 From the passage, we can imagine that people watching a film about the North Pole would probably want __________.
A. an ice cream B. a cold shower C. a hot drink D. a hot iron
2. A hypnotist is supposed to be able to control __________.
A. patients’ bodies B. people’s minds
C. patients’ diseases D. people’s movements
3. The phrase “the reality” refers to __________.
A. a real burn B. a hot iron C. the touch of ice D. the body’s reaction
4. A good title for this passage would be __________.
A. Mind and Body B. Physical Signs
C. Research on Mind D. The Power of the Mind
三：阅读理解（共25小题；每小题2分，满分50分）
Eye Facts
There are many commonly held beliefs about eyesight that are not proven facts. For example, some people believe that wearing glasses too soon weakens the eyes. But there is no evidence to show that the structure（结构）of eyes is changed by wearing glasses at young age. Wearing the wrong glasses, however, can prove harmful. Studies show that for adults there is no danger, but children can develop loss of sight if they have glasses unsuitable for their eyes.
We have all heard some of the common myths about how eyesight gets bad. Most people believe that reading in weak light causes poor eyesight, but that is untrue. Too little light makes the eyes work harder, so they do get tired and strained. Eyestrain also results from reading a lot, reading in bed, and watching too much television. However, although eyestrain may cause some pain or headaches, it does not damage eyesight in the long term.
Another myth about eyes is that they can be replaced, or transplanted from one person to another. There are close to one million nerve fibers（神经纤维）that connect the eyeball to the brain; as of yet, it is impossible to connect them all in a new person. Only certain parts of the eye can be replaced. But if we keep clearing up the myths and learning more about the eyes, someday a full transplant may be possible!
1. This passage is mostly about __________.
A. different types of eye problems B. myths about eyesight
C. beliefs of eye doctors D. eye transplants
2. One cause of eyestrain mentioned in the passage is __________.
A. wearing glasses too long B. suffering from pain or headaches
C. reading in poor light D. reading before going to bed
3. From the passage we can conclude that __________.
A. doctors are still learning things about eyesight
B. wearing wrong glasses is less harmful to adults
C. eye transplants have been performed successfully
D. people should not wear glasses at young age
