Everything on the earth _____ all the time.
A. is changing
B. is changed
C. has changed
D. has been changed
It has been proven that on the Earth, the closer one stays to the Earth, the more slowly time would seem to go.()
Our teacher told us that the earth__________ (be) round.
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
On Venus there is a lot of__________.
A. water
B. carbon dioxide
C. carbon monoxide
D. oxygen
答案:B
解析:
由第--f&的最后一句话中的“there is only a tiny amount ofwater there(Venus)”得知,A选项错误。第三段结尾说明,藻类通过火箭运往金星,然后“In a fairly short time,the algae will break down the carbon dioxide into oxygen and carbon”.说明金星上有大量的二氧化碳。C和D选项错误。故选B。
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
Man can eventually land on Venus only when__________.
A. the algae have done their work
B. the atmosphere becomes cooler
C. there is oxygen
D. it rains there
答案:D
解析:
由最后一段中“before man can set foot on Venus it will be necessary for the oxygen to produce rain”可知,只有金星上有降雨,人类才最终有可能在上面着陆。所以正确答案为D。
英语首字母填空练习题及答案The u means the earth , the sun , the moon and the stars and the space b them . Many of the stars are so f away that we can not see them The moon , our satellite ,travels a the earth . It has already been visited b man from the earth . Man-made satellites have been sent up i space by many countries . They go round the earth . They areused for helping us to learn more a the earth , the weather and other things . They are also used for sending and r messages . It makes people f different countriesunderstand each other much better . So people say the world itself is becoming a much s place. People call the small place the global village1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 答案:1. universe 2. between 3. far 4. around 5. by ,6. into 7. about 8.receiving 9. from 10. smaller .A: G lafternoon. What can I do for you ?B: Yes, please. Id like 想要 to see a T- shirt.A: What c 2 do you like?B: I like pink very m 3.A: S 4, we dont have any pink T-shirts. B 5 we have some brown o 6.B: Let me see.A: OK, h 7 ere you are.B: Oh, the color is very nice. Can I try 试穿 i 8?A: Sure. You,re c 9_ool.B: T 10 you.答案:1. Good2. color3. much4. Sorry5. But6. ones7. here8. it9. cool10. Thank.Henry was worried. This was his first time to go traveling by air. He did not know h to find his seat, so he went to the air hostess and asked, “Could you help me? I cant find my seat.”The air hostess s him the seat and told him to sit d and fasten the seat belt. She told Henry not to m about when the plane was going up. And she also said that Henrys earsmight feel a little s, but he didnt need to worry about it b many people felt like that. When the plane was f very high, Henry could stand up and walk round. He coulde read books, newspapers or see films. The air hostess would b food and drinks. Henry could e the flight and arrived home soon.1. 2. 3. 4. 5. 6.7.8.9.10.答案:1. how 2. showed 3. down 4. move 5. strange ,6. because 7. flying 8. either 9. bringlO. enjoy感谢您的阅读,祝您生活愉快。
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
CarlSagan believes that Venus might be colonized from earth because__________.
A. it might be possible to change its atmosphere
B. its atmosphere is the same as the earth's
C. there is a good supply of water on Venus
D. the days on Venus are long enough
答案:A
解析:
由第二段第一句中的“itwill be possible to change the atmosphere ofVenus and so create a new worl d”可知.so是表示因果的连接词,前因后果,所以正确答案A。
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
In the long run, the most difficult problem caused by population growth on earth will probably be the lack of__________.
查看材料
A.food
B.oil
C.space
D.resources
答案:C
解析:
由第一段可知,如果人口按照目前速度持续膨胀的话,地球上最终会缺乏资源来维持这么多的生命。即使科学家发明出替代资源,拥挤的人口也使我们不得不到其他星球寻找生存空间。但是目前太阳系还没有发现能维持生命的行星。因此和缺乏资源相比,缺乏生存空间才是最令人担忧、最难解决的问题。所以正确答案为C。
Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
CarlSagan believes that Venus might be colonized from earth because__________.
查看材料
A.it might be possible to change its atmosphere
B.its atmosphere is the same as the earth's
C.there is a good supply of water on Venus
D.the days on Venus are long enough
答案:A
解析:
由第二段第一句中的“itwill be possible to change the atmosphere ofVenus and so create a new worl d”可知.so是表示因果的连接词,前因后果,所以正确答案A。
共用题干
第三篇
Preserve the Environment
Throughout history man has changed his physical environment in order to improve his way of life.
With the tools of technology he has altered many physical features of the earth.He has transformed
woodlands into farmland,and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric
power. Man has also modified the face of the earth by draining marshes and cutting through mountains to
build roads and railways.
However,man's changes to the physical environment have not always had beneficial results.Today,
pollution of the air and water is an increasing danger to the health of the planet.Each day thousands of tons
of gases come out of the exhausts of motor vehicles;smoke from factories pollutes the air of industrialized areas
and the surrounding areas of countryside.The air in cities is becoming increasingly unhealthy.
The pollution of water is equally harmful.In the sea,pollution from oil is increasing and is killing enor-
mous numbers of algae(水藻),fish and birds.The whole ecological balance of the sea is being changed.
The same problem exists in rivers.Industrial wastes have already made many rivers lifeless.
Conservationists believe that it is now necessary for man to limit the growth of technology in order to sur-
vive on earth.
According to the passage,pollution of the air and water is caused by__________.
A:thousands of tons of gases coming out of the exhausts of motor vehicles
B:the changes of the environment that technology has brought to man
C:the increasing amount of oil that has been produced
D:industrial wastes discharged into rivers
答案:B
解析:
由文章第一段可知,人类改变自然环境是为了改善生活。故选D。
文章第二段提出人类使用技术工具改变了地球的自然面貌,为自己带来了便利。第三段说然而人类改变自然环境带来的不只是有利的一面。空气和水的污染已经威协到了植物的 健康生长。由此得知,空气和水的污染是由技术带给人类的环境的变化造成的。
由文章倒数第二段可知,随着石油开发对大海污染的加剧,大量的水藻.鱼类和鸟类被 杀死,由此造成海洋生态平衡的改变。故选C。
该题干问:最可能与环境保护者意见不一致的是?关于环境保护者的意见出现在文章 最后一段,"Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth",可知环境保护者认为现在应该限制技术的发展速度以保证人类在 地球上生存下去。在四个选项中,A项Industrialists(工业家)与技术发展联系的最紧密,因此 最可能会不同意环境保护者的意见。C项Businessmen(商人)包括的范围很广,并不是所有的 商业活动都与技术发展有关。故选A。
从全文看,这篇文章的目的是:D项号召人们注意保护自然环境。第5部分:补全短文
共用题干
第三篇
Preserve the Environment
Throughout history man has changed his physical environment in order to improve his way of life.
With the tools of technology he has altered many physical features of the earth.He has transformed
woodlands into farmland,and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric
power. Man has also modified the face of the earth by draining marshes and cutting through mountains to
build roads and railways.
However,man's changes to the physical environment have not always had beneficial results.Today,
pollution of the air and water is an increasing danger to the health of the planet.Each day thousands of tons
of gases come out of the exhausts of motor vehicles;smoke from factories pollutes the air of industrialized areas
and the surrounding areas of countryside.The air in cities is becoming increasingly unhealthy.
The pollution of water is equally harmful.In the sea,pollution from oil is increasing and is killing enor-
mous numbers of algae(水藻),fish and birds.The whole ecological balance of the sea is being changed.
The same problem exists in rivers.Industrial wastes have already made many rivers lifeless.
Conservationists believe that it is now necessary for man to limit the growth of technology in order to sur-
vive on earth.
Man has changed his physical environment with a view to_________.
A:altering the physical features of the earth
B:modifying the face of the planet
C:improving his surroundings'
D:bettering his way of life
答案:D
解析:
由文章第一段可知,人类改变自然环境是为了改善生活。故选D。
文章第二段提出人类使用技术工具改变了地球的自然面貌,为自己带来了便利。第三段说然而人类改变自然环境带来的不只是有利的一面。空气和水的污染已经威协到了植物的 健康生长。由此得知,空气和水的污染是由技术带给人类的环境的变化造成的。
由文章倒数第二段可知,随着石油开发对大海污染的加剧,大量的水藻.鱼类和鸟类被 杀死,由此造成海洋生态平衡的改变。故选C。
该题干问:最可能与环境保护者意见不一致的是?关于环境保护者的意见出现在文章 最后一段,"Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth",可知环境保护者认为现在应该限制技术的发展速度以保证人类在 地球上生存下去。在四个选项中,A项Industrialists(工业家)与技术发展联系的最紧密,因此 最可能会不同意环境保护者的意见。C项Businessmen(商人)包括的范围很广,并不是所有的 商业活动都与技术发展有关。故选A。
从全文看,这篇文章的目的是:D项号召人们注意保护自然环境。第5部分:补全短文