There is no doubt __1__ the earth is becoming warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon.
Many scientists like Dr. Janice Foster believe that people have caused the increase in the earth's temperature __2__ burning of fossil fuels like coal,natural gas and oil to produce energy __3__ byproducts are called “greenhouse” gases,the most important one __4__ carbon dioxide. These gases trap heat from the sun and therefore warm the earth,without which the earth __5__(be)about thirty-three degrees Celsius cooler than it is. But increased amount of carbon dioxide means that __6__ heat energy is trapped in the atmosphere,__7__(cause)the global temperature to go __8__.
On __9__other hand,scientists like George
Hambley
believe that any warming will be mild with __10__ bad environmental consequences and more carbon dioxide is actually a positive thing. 答案:1.that
2.by
3.whose
4.being
5.wouldbe
6.more 7.causing
8.Up
9.the
10.few Ⅵ.考点活用
用本单元所学的词组、句型翻译下面短文
与过去一个世纪相比,地球表面的温度已经大约升高了一摄氏度。其实,我们也可以感受得到,我们越来越难以忍受夏天的炎热,也不习惯冬天的暖和。气温的升高已经对人类的健康、动植物的生存,生态系统的平衡产生了很大的影响。毫无疑问,人类的活动应该对环境的恶化负责任。条件允许的话,世界各国都应该采取措施努力改善环境。若没有全世界人们的共同奋斗,我们明天将会是怎样? 答案:
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