What will people die of 100 years from now？ If you think that is not a simple question， you have not been paying attention to the revolution that is taking place in bio­technology(生物技术). With the help of new medicine， the human body will last a very long time. Death will come mainly from accidents， murder and war. Today's leading killers， such as heart disease， cancer， and aging itself， will become distant memories.

In discussion of technological changes， the Internet gets most of the attention these days. But the change in medicine can be the real technological event of our times. How long can humans live？ Human brains were known to decide the final death. Cells are the basic units of all living things， and until recently， scientists were sure that the life of cells could not go much beyond 120 years because the basic materials of cells， such as those of brain cells， would not last forever. But the upper limits will be broken by new medicine. Sometime between 2050 and 2100， medicine will have advanced to the point at which every 10 years or so， people will be able to take medicine to repair their organs. The medicine， made up of the basic building materials of life， will build new brain cells， heart cells，and so on－in much the same way our bodies make new skin cells to take the place of old ones.

It is exciting to imaging that the advance in technology may be changing the most basic condition of human existence， but many technical problems still must be cleared up on the way to this wonderful future. 

1.According to the passage， human death is now mainly caused by____ 　　

A. diseases and aging                  B. accidents and war

C. accidents and aging                 D. heart disease and war

2.Humans may live longer in the future because ____　　

A. heart disease will be far away from us

B. human brains can decide the final death

C. the basic materials of cells will last forever

D. human organs can be repaired by new medicine

3.We can learn from the passage that ____

A. human life will not last more than 120 years in the future

B. humans have to take medicine to build new skin cells now

C. much needs to be done before humans can have a longer life

D. we have already solved the technical problems in building new cells

For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone on outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships travelling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescopes to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

Of the 200 billion stars in the Milky Way galaxy(银河星系), scientist find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets supports some life.

However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible message shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is about 20 billion years old. In that time, some scientists think it is likely that civilizations much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

1. According to the passage, how many planets in our galaxy might be inhabitable?

A. 5 billion.　　　　　　 B. 10 billion.

C. 15 billion.　　　　　　 D. 200 billion.

2. The first paragraph in this passage is mainly about 　　　　 .

A. how scientists are looking for signs of life on other planets

B. why scientists are looking for signs of life on other planets

C. where scientists are looking for signs of life on other planets

D. when scientists are looking for signs of life on other planets

3. The underlined word “monitor” in the second paragraph means “　　　　 ”.

A. find　 B. follow　 C. check　 D. form

4. Which of these statements is TRUE based on the information in the passage?

A. The earth is one of the oldest planets in our galaxy.

B. Most scientists believe that there is intelligent life on other planets.

C. Scientists are trying different ways to find signs of life on other planets.

D. Scientists don’t believe that there might be life on other planets.

The word “conservation” has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such a good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster than the supplies of raw materials: most of them, even until very recently, had the foolish idea that the treasures were “limitless” and could “last forever”. Most of the citizens of earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, an unhealthy condition of one part will sooner or later be harmful to all the others.

　　Fifty years ago, nature study was not part of the school work; scientific forestry was a new idea; wood was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied long-term climatic cycles in relation to proper land use; even the word “conservation” had nothing of the meaning that it has for us today.

　　For the sake of ourselves and those who will come after us, we must now set about correcting the mistakes of our forefathers. Conservation should be made part of everybody’s daily life. To know about the water table in ground is just as important to us as a knowledge of the basic math formulas. We need to know why all watersheds (上游集水区) need the protection of plant life and why the running current of streams and rivers must be made to give their full benefit to the soil before they finally escape to the sea. We need to be taught the duty of planting trees as well as of cutting them. We need to know the importance of big, grown trees, because living space for most of man’s fellow creatures on this planet is figured not only in square measure of surface but also in cubic (立方体的) volume above the earth. In a word, it should be our goal to restore as much of the original beauty of nature as we can.

1.The author’s attitude towards the use of natural resources is _________.

    A. positive         B. uninterested     C. optimistic           D. critical

2.According to the author, the greatest mistake of our forefathers was that _________.

　　A. they had no idea about scientific forestry

　　B. they had little or no sense of environmental protection

　　C. they were not aware of the importance of nature study

　　D. they had no idea of how to make good use of raw materials

3.To avoid repeating the mistakes of our forefathers, the author suggests that _________.

　　A. we plant more trees

　　B. natural sciences be taught to everybody

　　C. environmental education be directed toward everyone

　　D. we return to nature

4.How can you understand the underlined sentence in the last paragraph?

A. Our living space on the earth is getting smaller and smaller.

B. Our living space should be measured in cubic volume.

C. We need to take some measures to protect space.

D. We must preserve good living conditions for both birds and animals.

The word “conservation” has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such a good condition that others may also share the enjoyment. Our forefathers had no idea that human population would increase faster than the supplies of raw materials: most of them, even until very recently, had the foolish idea that the treasures were “limitless” and could “last forever”. Most of the citizens of earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, an unhealthy condition of one part will sooner or later be harmful to all the others.

　　Fifty years ago, nature study was not part of the school work; scientific forestry was a new idea; wood was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied long-term climatic cycles in relation to proper land use; even the word “conservation” had nothing of the meaning that it has for us today.

　　For the sake of ourselves and those who will come after us, we must now set about correcting the mistakes of our forefathers. Conservation should be made part of everybody’s daily life. To know about the water table in ground is just as important to us as a knowledge of the basic math formulas. We need to know why all watersheds (上游集水区) need the protection of plant life and why the running current of streams and rivers must be made to give their full benefit to the soil before they finally escape to the sea. We need to be taught the duty of planting trees as well as of cutting them. We need to know the importance of big, grown trees, because living space for most of man’s fellow creatures on this planet is figured not only in square measure of surface but also in cubic (立方体的) volume above the earth. In a word, it should be our goal to restore as much of the original beauty of nature as we can.

1.The author’s attitude towards the use of natural resources is _________.

A. positive         B. uninterested     C. optimistic           D. critical

2.According to the author, the greatest mistake of our forefathers was that _________.

　　A. they had no idea about scientific forestry

　　B. they had little or no sense of environmental protection

　　C. they were not aware of the importance of nature study

　　D. they had no idea of how to make good use of raw materials

3.To avoid repeating the mistakes of our forefathers, the author suggests that ______

　　A. we plant more trees

　　B. natural sciences be taught to everybody

　　C. environmental education be directed toward everyone

　　D. we return to nature

4.How can you understand the underlined sentence in the last paragraph?

A. Our living space on the earth is getting smaller and smaller.

B. Our living space should be measured in cubic volume.[来源:Z。xx。k.Com]

C. We need to take some measures to protect space.

D. We must preserve good living conditions for both birds and animals.

.
The results of the US/NATO bombing Yugoslavia are to be judged by history. I shall not be the one to do this. But being in the center of actual events that are creating that history, I cannot stay away from what is going on in my country.
　　First of all, the main aim of the bombing was to prevent a human suffering in Kosovo. Today, after many days of frequent bombing, that aim is more distant than before. The bombing only brought tens of thousands of people running away from their homes, not to mention the large number of the death and injury, buildings and factories. Suppose that the US/NATO really had a wish to prevent the human suffering, they should realize by now how wrong they were when they thought the bombing would solve the problem.
　　So, what’s left? Back off or ground troops? But who is going to join the ground troops? It would take at least 200,000 armed soldiers, not the 20,000 that the US/NATO have prepared in Macedonia. It should also be clear that the Serbs(塞族人) will not give up on Kosovo.
　　I live under continuous bombing for more than a week now, and it doesn’t frighten me anymore. I don’t turn to the shelter at the sound of warning. It’s the thought of ground troops that frightens me. Vietnam would seem like a picnic compared to a bloodshed(流血事件) in Kosovo if the ground troops appear. Is that what the US/NATO wants?
72. Which of the following statements is true?
　　A. The US/NATO really intends to stop the human suffering.
　　B. The result of the war will be judged by people in Kosovo.
　　C. The bombing made tens of thousands of people homeless.
　　D. The continuous bombing will make the Serbs give up on Kosovo.
73. The writer is _____.
　　A. an American reporter 　　　  B. a Chinese reporter
　　C. a Macedonian　　　　　　　 D. a Yugoslavian
74. What worries the writer most?
　　A. The continuous bombing. 　　　　　B. The coming of the ground troops.
　　C. The sound of bomb warning.　　　　D. The idea of ground troops.
75. What is the writer’s attitude towards the bombing in Kosovo?
　　A. It is the US/NATO’s duty to defend Kosovo.
　　B. It is wrong to solve the problem by bombing Kosovo.
　　C. The aim of bombing Kosovo is to stop a human suffering.
　　D. The bombing can solve the problem of Kosovo.