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| Many scientists say that the world is getting hotter and hotter. If they are right, the ice at the North and South Pole will melt eventually. If this happens, the sea will 1 and may cover most 2 all of Singapore. This will force everybody to move to a 3 country. We know that the sun 4 the earth. The heat from the sun hits the 5 , and some of 6 goes back into the sky. However, factories and cars 7 a lot of carbon dioxide (二氧化碳). When the gas rises into the sky, the heat from the sun can come 8 them but the heat from the ground cannot. It 9 near us in the sky and makes the 10 hotter and hotter every year. Scientists call this the "greenhouse effect" because a greenhouse is a small glass 11 which is hot inside. It is used for 12 plants in cool countries. Many countries are 13 about the greenhouse effect. They are trying to stop factories and cars from sending 14 gases into the sky. Scientists are not sure when the world will get much hotter. Some people say that the greenhouse effect has 15 already and has begun to affect the world's weather. | ||||
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believe that the weather is changing.
The earth will perhaps be warmed by about 7℃ at the South Pole (极) and the North Pole. The ice will
be melt (融化). The sea level (平面) will rise by about 7 meters. As a result, water will cover cities like
London, Tokyo and New York. Some ports (港口) and towns along the coasts will disappear under water.
Some other scientists think that the dust, smoke and pollution from coal, wood and oil fires will block
out (封闭) the ultraviolet rays (紫外线). Then the earth will become colder and great sheets of ice will
cover Europe and North America.
When chemicals in the air mix with rain, we have acid (酸) rain. Acid rain can bring us great harm. It
destroys (破坏) forests and kills life in lakes and rivers.
People are beginning to see how serious the problem is. They find it important to work with nature
instead of against it. They are trying to save the earth in many different ways. But one of the most important
things to do is to make people understand that saving the earth is saving ourselves.
B. we need coal in our forests
C. we can find oil in our forests
D. we have to burn down the forests every year
B. cover cities like London and Tokyo
C. raise the sea level by 7 degrees
D. become water and make the sea rise
B. kill pests (害虫) in lakes and forests
C. kill the fish in rivers and lakes
D. cover Europe and North America
B. The ultraviolet rays will come more because of the dust and pollution from fires.
C. According to the scientists, the change in weather hardly has anything to do with the pollution.
D. As a result of the dust and pollution from coal, wood and oil fires, the earth will become colder.
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Antarctica is the continent which is the most 1 area of land on the Earth and is mostly covered 2 ice. This is 3 of the driest and 4 in the world. But people from all over the world come to 5 there. Near the South Pole, three 6 people live together in a place 7 Amunsen- Scott Station. |
| The station has libraries, cinemas, shops, sports rooms, canteens and laboratories (实验室). There is electricity (电), and they have 8 the system that they use to have a conversation (交谈) 9 someone in another place. And they have 10 electronic machines that stores information and uses programs to help the m find, organize, or change the information. But the people here 11 travel by car, or train, or bus, because there aren't any roads or railways near the station. They travel by ship, helicopter, plane, or snow tractor, or 12 dogs. There aren't 13 trees or flowers there, but there are hundreds of different birds and other animals. |
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Most of the people here are 14 . They study plant and animal life and how ice moves. The ice can tell us about changes in climate. Ray Kingman is an expert at Amundsen-Scott Station, telling us on the phone, "This is my second year here. It's a very interesting and beautiful place, but life is very hard 15 . In the summer we can go swimming in hot pools of water. We welcome newcomers here for further study of the continent!" |
| ( )1. A. southern ( )2. A. for ( )3. A. a ( )4. A. warm areas ( )5. A. travel ( )6. A. thousands ( )7. A. called ( )8. A. telephones ( )9. A. with ( )10. A. computers ( )11. A. don't ( )12. A. with ( )13. A. much ( )14. A. teachers ( )15. A. in the winter |
B.northern B. at B. that B. coldest places B. go sightseeing B. thousand B. call B. radios B. in B. printers B. didn't B. on B. any B. scientists B. during the autumn season |
C. eastern C. with C. one C. cool areas C. work C. thousands of C. calls C. televisions C. at C. mouse C. weren't C. in front of C. either C. doctors C. in all weather. |
Many scientists say that the world is getting hotter and hotter．If they are right , the ice at the North and South Pole will melt eventually．If this happens, the sea will 1 and may cover most 2 all of Singapore．This will force everybody to move to a 3 country．
We know that the sun 4 the earth．The heat from the sun hits the 5 , and some of 6 goes back into the sky．However, factories and cars 7 a lot of carbon dioxide（二氧化碳）．When the gas rises into the sky, the heat from the sun can come 8 them but the heat from the ground cannot．It 9 near us in the sky and makes the 10 hotter and hotter every year．
Scientists call this the “greenhouse effect” because a greenhouse is a small glass 11 which is hot inside．It is used for 12 plants in cool countries．Many countries are 13 about the greenhouse effect．They are trying to stop factories and cars from sending 14 gases into the sky．Scientists are not sure when the world will get much hotter．Some people say that the greenhouse effect has 15 already and has begun to affect the world’s weather．
1．A．rise B．fall C．change D．disappear
2．A．and B．or C．but D．till
3．A．better B．larger C．safer D．farther
4．A．shines B．circles C．covers D．heats
5．A．ground B．sky C．mountain D．forest
6．A．them B．it C．those D．such
7．A．make B．spread C．produce D．from
8．A．through B．over C．into D．toward
8．A．hides B．continues C．follows D．stays
10．A．cloud B．air C．season D．temperature
11．A．building B．flat C．tool D．machine
12．A．putting B．storing C．cutting D．growing
13．A．excited B．disappointed C．worried D．pleased
14．A．dangerous B．harmful C．heavy D．useful
15．A．meant B．improved C．started D．stopped
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