It is difficult for doctors to help a person with a hurt brain. Without enough blood, the brain lives only three to five minutes. Sometimes the hurt brain gets better by itself. More often the doctors can't fix the hurt brain. Sometimes they are afraid to try something to help. It is dangerous to work on the brain. The doctor might make the person worse if he works on the brain.
Dr. Robert J. White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should try to make the brain become very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctors 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 opera-ted 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 temperature was 10 degrees. 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 were before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
Dr. White's idea works well on the monkeys. Are there other problems with human beings? Dr. White thinks doctors will use his idea on human beings. He thinks it will help people who have heart problems, too. A person doesn't have to die when his heart stops? doctors can start it again. The problem comes when the brain is without blood for three to five minutes—the person has a living body, but a dead brain. Maybe in the future, doctors will try Dr. White's idea. When the person's heart stops, the doctors will quickly try to cool the brain. They will have 30 minutes to start the heart again. Maybe there will be no problem with the brain. People probably die when __________.
| A.their brain dies |
| B.their heart stops |
| C.they stop breathing |
| D.their brain becomes very hot |
Dr. White thinks his idea about cooling the brain will work because __________.
| A.he has tried it on people |
| B.he has tried it on monkeys |
| C.he has tried it on heart problems |
| D.he has tried it on himself |
Which of the following is not true?
| A.Doctors can begin the heart again in five minutes. |
| B.Doctors can begin the heart again after 30 minutes. |
| C.Doctors can change patients' hearts. |
| D.Doctors can change a person's face. |
According to the writer,__________.
| A.it is not difficult to repair the brain damage |
| B.it is worse to make a mistake on the brain than any other part of the body |
| C.brain is not an important part in one's body |
| D.brain doesn't need blood |
This year some twenty-three hundred teenagers(young people aged from13~19)from all over the world will spend about ten months in U.S. homes. They will attend U.S. schools, meet U.S. teenagers, and form impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world.
Here is a two-way student exchange in action. Fred, nineteen, spent last year in Germany with George’s family. In turn, George’s son Mike spent a year in Fred’s home in America.
Fred, a lively young man, knew little German when he arrived, but after two months’study the language began to come to him. School was completely different from what he had expected—much harder. Students rose respectfully when the teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no outside activities.
Family life, too, was different. The father’s word was law, and all activities were around the family rather than the individual. Fred found the food too simple at first. Also, he missed having a car.
“Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it.”
At the same time, in America, Mike, a friendly German boy, was also forming his idea. “I suppose I should criticize(批评)American schools,” he said. “It is far too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe your schools are better in training for citizens. There ought to be some middle ground between the two.”This year ________teenagers will take part in the exchange programme between America and other countries.
| A.twenty-three hundred | B.thirteen hundred |
| C.over three thousand | D.less than two thousand |
The whole exchange programme is mainly to__________.
| A.help teenagers in other countries know the real America |
| B.send students in America to travel in Germany |
| C.let students learn something about other countries |
| D.have teenagers learn new languages |
Fred and Mike agree that__________.
| A.America food tasted better than German food |
| B.German schools were harder than American schools |
| C.Americans and Germans were both friendly |
| D.There were more cars on the streets in America |
What is particular in American schools is that________.
| A.there is some middle ground between the two teaching buildings |
| B.there are a lot of after-school activities |
| C.students usually take fourteen subjects in all |
| D.students go outside to enjoy themselves in a car |
“An apple a day keeps the doctor away.” Similarly, if we drink a little more water ever day, we may find that we need to go to the doctor a lot less often. A healthy diet is made up of water and a great many different kinds of foods. We know that healthy foods like fruits, vegetables and fish, are important as they provide us with energy and fibre, without giving us too much fat and sugar. But why is water important?
The human body needs water to survive. Water is important as it carries poisons and waste out of our bodies. However, doctors advise us to drink plenty of water, much more than the small amount we need to stay alive.
Some doctors believe that water is important for our health in all kinds of ways. They believe that a great many illnesses and health problems stars as a result of dehydration—a lack(缺少) of water in the body. Most people are dehydrated at least some of time, although they probably don’t know it. It is surprising to learn that if we feel thirsty, we are already in the first stages of dehydration. In fact, we are advised to drink water before we feel thirsty.
These doctors think that health problems such as headaches, high blood pressure and asthma could be helped if people drink more water. They also believe that drinking more water can help people who are overweight. Water contains no calories so it will not make us put on weight. If we drink water, we will probably drink less sugary soft drinks such as Coca-cola. Doctors also believe that drinking more water may stop people from overeating. They say that many people think that they are hungry when they are, in fact, thirsty. Doctors suggest, therefore, that we eat less food and drink more water.
There are still many health problems that cannot be solved by drinking water, so we should not stop going to seeing the doctor completely. However, if we make a decision to drink water every day, we may find that we need to go to the doctor a lot less often.We need _____for a healthy diet.
| A.fibre | B.food | C.water | D.Water and different foods |
From the text, we know water can carry_________.
| A.energy and fibre in our bodies | B.fruit, vegetables and fish in our bodies |
| C.sugar and fat out of our bodies | D.poisons and waste out of our bodies |
Lack of water caused people to put on weight too much because_______.
| A.they think they are hungry and eat too much |
| B.they think they are thirsty and eat less |
| C.water has no calories |
| D.it makes them hungry |
Which of the following isn’t mentioned in the passage?
| A.Fruit provides us with energy and fibre. |
| B.Some healthy problems start because of a lack of water. |
| C.Drinking more water may stop people from overeating. |
| D.The amount of water a person should drink in a day. |
Sometimes children do not do what their parents tell them to do. When this happens, a parent tries to help the child to do the right thing. When this does not work, the parent usually punishes the child.
There are many things that a parent can do. One thing that people have done is to spank (打屁股) the child. When a parent spanks a child, they will use their hand or a hard object to strike them on their bottom. This is meant to show the child that they have done something wrong
everything and not try other ways to get the child to do the right thing。
Many parents are not sure of what to do instead of spanking. Some people think that their religion(宗教)tells them that spanking is okay. Some think that the law lets them do it. The courts (法院) say that parents have the right to teach their children how to behave.
Other things should be tried before a parent decides to spank a child. Telling the child exactly what is wanted from them can be one thing. Giving a child more than one choice is another thing that can be tried. Getting down to the child’s level and taking a more child-friendly approach (方法) can help as well.According to the passage, when children do something wrong, one thing that parents usually do to punish them is to ________.
| A.strike them on the bottom | B.try to help them do the right thing |
| C.teach them what to do | D.take them to court |
Which of the following is NOT the problem caused by spanking?
| A.It teaches the child to hit others when they offend him or her. |
| B.The parent may get angry and hit the child too hard. |
| C.Sometimes parents may use spanking for everything. |
| D.It makes parents try other ways to make the child do right. |
Which of the following can best describe the writer’s attitude towards spanking?
| A.favorable (赞同的) | B.indifferent (不关心) |
| C.interested | D.unfavorable |
From this passage, we can conclude that ________.
| A.Good children always do the right thing. |
| B.Parents should try their best to avoid spanking their children. |
| C.Parents have no choice but to spank their children when they do something wrong. |
| D.Children can have more than one choice to avoid being spanked. |
We are going to see the ruins of Machu Picchu in the mountains of the Andes.Machu Picchu was forgotten for centuries but discovered in 1911 by Hiram Bingham, a professor from Yale.It is said to be one of the most beautiful ancient sites in the world.
The Incas built the ancient civilization of Machu Picchu between the 12th century and the early 16th century.They spoke a language called Quechua but had no writing system at all.They kept records on various coloured strings with knots called quipu.
The Incas proved to be wonderful architects.They built most of their buildings with huge stones but without using any cement(粘结材料) to stick them together.However, the huge stones fit together so perfectly that you cannot force a sharp knife between two blocks.They also built bridges, tunnels through mountains and channels to bring water to their cities—just as the Romans did.The Incas turned the mountains into farmlands and planted corn and potatoes, and raised animals like llama and alpaca for food.
Now Machu Piccu has become a major tourist site in Peru, attracting people from all over the world.How long ago was Machu Picchu discovered?
| A.About 20 years ago | B.About 50 years ago. |
| C.About 70 years ago | D.About a century ago. |
With what did the Incas build their wonderful buildings?
| A.strings | B.stones | C.cements | D.trees |
The Incas built the following like the Romans except _______ according to the passage.
| A.roads | B.bridges | C.tunnels | D.channels |
What does the speaker probably do?
| A.A visitor. | B.A guide. | C.A teacher. | D.A scientist. |
For thousands of years, man has enjoyed the taste of apples. Apples, which are about 85 percent water, grow almost everywhere in the world but the hottest and coldest areas (地区). Among the leading countries in apple production are China, France and the United States.
There are various kinds of apples, but a very few make up the majority of those grown for sale. The three most common kinds grown in the United States are Delicious, golden Delicious, and McIntosh.
Apples are different in colour, size, and taste. The colour of the skin may be red, green, or yellow. They have various sizes, with Delicious apples being among the largest. The taste may be sweet or tart (酸的). Generally, sweet apples are eaten fresh while tart apples are used to make applesauce (苹果酱).
Apple trees may grow as tall as twelve meters. They do best in areas that have very cold winters. Although no fruit is yielded during the winter, this cold period is good for the tree. It can be learned from the text that Delicious apples are __________
| A.grown in France. | B.sold everywhere. |
| C.very big. | D.quite sweet. |
Cold winter weather is good for ___________
| A.the growth of apple trees. |
| B.producing large apples. |
| C.improving the taste of apples. |
| D.the increase of water in apples. |
China, France and the United States are considered to _______________
| A.be large producers of apples. |
| B.be large producers of applesauce. |
| C.have the longest history in apple production. |
| D.have the coldest winter among apple producing countries. |
The word yielded in the last sentence means _______________
| A.improved. | B.increased. | C.produced. | D.sold. |