It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can't fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain.
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on them. He made the monkeys' blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain's temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.The biggest difficulty in operating on the damaged brain is that _______.
| A．the time is too short for doctors |
| B．the patients are often too nervous |
| C．the damage is extremely hard to fix |
| D．the blood-cooling machine might break down |
The brain operation was made possible mainly by _______.
| A．taking the blood out of the brain |
| B．trying the operation on monkeys first |
| C．having the blood go through a machine |
| D．lowering the brain' s temperature |
With Dr. White's new idea, the operation on the damaged brain _______.
| A．can last as long as 30 minutes |
| B．can keep the brain' s blood warm |
| C．can keep the patient' s brain healthy |
| D．can help monkeys do different jobs |
What is the right order of the steps in the operation?
a. send the cooled blood back to the brain b. stop the blood to the brain
c. have the blood cooled down d. operate on the brain
| A．a,b,c,d | B．c,a,b,d | C．c, b, d, a | D．b, c, d, a |
Why should mankind explore space? Why should money, time and effort be spent exploring and researching something with so few obvious benefits? Why should resources be spent on space rather than on conditions and people on Earth? These are questions that, understandably, are very often asked.
Perhaps the best answer lies in our genetic makeup (基因构成) as human beings. What drove our ancestors to move from the trees into the plains, and on into all possible areas and environments? The wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.
Nearly every successful civilization(文明) has explored, because by doing so, any dangers in surrounding areas can be identified and prepared for. Without knowledge, we may be completely destroyed by the danger. With knowledge, we can lessen its effects.
Exploration also allows minerals and other potential (潜在的) resources to be found. Even if we have no immediate need of them, they will perhaps be useful later. Resources may be more than physical possessions(物质财产). Knowledge or techniques have been gained through exploration. The techniques may have medical applications which can improve the length or quality of our lives. We have already benefited from other spin-offs including improvements in earthquake prediction, in satellites for weather forecasting and in communications systems. Even non-stick pans and mirrored sunglasses are by-products (副产品) of technological developments in the space industry!
While many resources are spent on what seems a small return, the exploration of space allows creative, brave and intelligent members of our species to focus on what may serve to save us. While space may hold many wonders and explanations of how the universe was formed or how it works, it also holds dangers. The danger exists, but knowledge can help human being to survive. Without the ability to reach out across space, the chance to save ourselves might not exist.
While Earth is the only planet known to support life, surely the adaptive(适应的) ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future.Why does the author mention the questions in Paragraph1?
| A．To express his doubts. |
| B．To compare different ideas. |
| C．To introduce points for discussion. |
| D．To describe the conditions on Earth. |
What is the reason for exploring space based on Paragraph2?
| A．Humans are nature-born to do so. |
| B．Humans have the tendency to fight. |
| C．Humans may find new sources of food. |
| D．Humans don't like to stay in the same place. |
The underlined word "spin-offs" in Paragraph 4 probably refers to______.
| A．survival chances | B．potential resources |
| C．unexpected benefits | D．physical possessions |
What makes it possible for humans to live on other planets?
| A．Our genetic makeup. | B．Resources on the earth. |
| C．The adaptive ability of humans. | D．By-products in space exploration. |
What does the writer want to tell us in the passage?
| A．Space exploration has created many wonders. |
| B．Space exploration provided the best value for money. |
| C．Space exploration can benefit science and technology. |
| D．The Exploration may help us avoid potential problems on Earth. |
Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend (保护) themselves by using both physical and chemical means.
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future.To defend themselves, oak trees use________.
| A．chemical means | B．physical means |
| C．bitter chemicals | D．sandy materials |
How does tobacco protect itself against an attack from a caterpillar?
| A．Its leaves fight against the attack by physical means. |
| B．Its roots send a messenger to discourage the caterpillar. |
| C．Its roots increase the production of nicotine when it is attacked. |
| D．Its leaves produce poisonous sand to drive the caterpillar away. |
What would be the best title for this passage?
| A．Plants and Animals |
| B．How Plants Defend Themselves |
| C．Attacks and Defenses |
| D．How Animals Eat Plant Leaves |
Jane Austen, a famous English writer, was born in Steventon, Hampshire, on December 16, 1775, and died on July 18,1817. She began writing early in life, although the prejudices(偏见)of her times forced her to have her books published anonymously.(匿名).
But Jane Austen is perhaps the best known and best loved of Bath’s many famous local people and visitors. She paid two long visits during the last five years of the eighteenth century and from 1801 to 1806, Bath was her home. Her deep knowledge of the city is fully seen in two of her novels, Northanger Addey and Persuasion, which are largely set in Bath. The city is still very much as Jane Austen knew it, keeping its streets and public buildings the well—ordered world that she described so well in her novels. Now the pleasure of learning Jane Austen’s Bath can be enhanced (增强)by visiting the Jane Austen Center in Gay Street. Here, in a Georgian town house in the heart of the city, you can find out more about Bath in Jane Austen’s time and the importance of Bath in her life and work.
The Center has been set up with the help and guidance of members of the Jane Austen Society. After your visit to the Center, you can look round the attractive shop, which offers a huge collection of Jane Austen related books, cards and many specially designed gifts. Jane Austen quizzes are offered to keep the children busy.
You can also have walking tours of Jane Austen’s Bath, which is a great way to find out more about Jane Austen and discover the wonderful Georgian city of Bath. The tour lasts about one and a half hours. The experienced guides will take you to the places where Jane lived, walked and shopped.Jane Austen paid two long visits to Bath__________ .
| A．in her early twenties | B．in her early teens |
| C．in her late twenties | D．in her late teens |
What can we learn about Bath from the passage? .
| A．Bath has greatly changed since Jane Austen’s death. |
| B．The city has changed as much as Jane Austen knew it. |
| C．Bath remains almost the same as in Jane Austen’s time. |
| D．No changes have taken place in Bath since Austen’s time. |
The author writes this passage in order to _____________.
| A．attract readers to visit the city of bath |
| B．ask readers to buy Austen’s books |
| C．tell readers about Jane Austen’s experience |
| D．give a brief introduction to the Jane Austen Society |
After you have visited the Center, you can get the following things EXCEPT________.
| A．books about Austen and her family life |
| B．cards and gifts that have something to do with Austen |
| C．the quizzes written by Austen to keep the children busy |
| D．the books written by the other writers about Austen |
In 1901，H. G. Wells, an English writer, wrote a book describing a trip to the moon. When the explorers landed on the moon, they discovered that the moon was full of underground cities. They expressed their surprise to the “moon people” they met. In turn, the “moon people” expressed their surprise. “Why,” they asked, “are you traveling to outer space when you don’t even use your inner space?”
H.G. Wells could only imagine travel to the moon. In 1969, human beings really did land on the moon. People today know that there are no underground cities on the moon. However, the question that the “moon people” asked is still an interesting one. A growing number of scientists are seriously thinking about it.
Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The “Channel”，a tunnel connecting England and France, is now complete.
But what about underground cities? Japan’s Taisei Corporation is designing a network of underground systems, called “Alice Cities”. The designers imagine using surface space for public parks and using underground space for flats, offices, shopping, and so on. A solar dome would cover the whole city.
Supporters of underground development say that building down rather than building up is a good way to use the earth’s space. The space, they say, can be used for farms, parks, gardens, and wilderness. H.G. Wells “moon people” would agree. Would you?The explorers in H.G. Well’s story were surprised to find that the “moon people”.
| A．knew so much about the earth |
| B．understood their language |
| C．lived in so many underground cities |
| D．were ahead of them in space technology |
What sorts of underground system are already here with us?
| A．Offices, shopping areas, power stations |
| B．Tunnels, car parks, shopping areas |
| C．Gardens, car parks, power stations |
| D．Tunnels, gardens, offices |
What would be the best title for the text?
| A．Alice Cities—cities of the future |
| B．Space travel with H.G. Wells |
| C．Enjoy living underground |
| D．Building down, not up |
Once there was an old man in a town. He always forgot a lot of things. So his wife always had to say to him, “Don’t forget this!”
One day he went on a long trip alone. Before he left home, his wife said, “Now you have all these things. They are what you need for your trip. Take care of your things during the trip.” He went to the station, bought a ticket and got on the train with it.
About half an hour later, the conductor began to see the tickets. He came to the old man and said, “Will you please show me your ticket?” The old man looked for his ticket in all his pockets, but he could not find it. He was very worried. “I can’t find my ticket. I really bought a ticket before I got on the train.” said the old man.
“I believe you bought a ticket. All right, you don’t have to buy another one,” said the conductor kindly. “But how can I know where I’m going? – I can’t remember my station!”the old man said sadly.The old man in the story was very ______.
| A．kind | B．poor | C．forgetful | D．sad |
Where is the ticket? _______
| A．The old man forgot to buy it. |
| B．The old man could not remember where it was. |
| C．The old man showed it to the conductor. |
| D．The old man’s wife took the ticket away. |
The old bought the ticket _____ he got on the train.
| A．after | B．before | C．as | D．when |
The conductor ______ the old man.
| A．didn’t believe | B．laughed at | C．believed | D．felt sorry for |
The old man was sad because _______
| A．he had to buy another ticket. |
| B．he lost all the things his wife gave him. |
| C．he did not know where he was. |
| D．he did not know where he should get off. |