Ⅴ.重点句型

　　Without the ‘greenhouse effect’,the earth would be about thirty-three degrees Celsius cooler than it is.(P26) 如果没有这种“温室效应”，地球的温度将比现在的温度还要低33 摄氏度左右。 剖析：without短语隐含一个虚拟条件，意为“要是没有……” 同样的表达有 “but for”如： Without your help,we could not have succeeded. 要是没有你的帮助，我们是不会成功的。 But for the Captain，s effort,all the people on board would have drowned in the sea. 要是没有船长的努力，船上所有的人都将已经在海里淹死了。 ◆活学活用 模仿造句。 (1)要是没有电，很多人仍将生活在黑暗之中。

　　Without electricity,many people _____________ in darkness. (2)要不是你帮助我学习，我就不能通过考试了。 ____________  答案：（1）would still live （2）But for your help in my study,I would have failed the exams. Or:Without your help in my study,I would not have passed the exam. Ⅵ.语篇领悟 根据课文The Earth is Becoming Warmer—But does It Matter?完成下列短文

　　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 

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