Unit 4 Global warming
二、课文要点
1课文词汇等填空（旨在复习本课文中的单词拼写和主要词语等）
根据课文内容完成下面语法填空，注意单词拼写和词语用法：
When 1 (compare) with most natural changes, that the temperature of the earth rose about one degree Fahrenheit during the 20th century is quite shocking. And it’s human activity 2 has caused this 3 (全球的) warming rather 4 a random but natural 5 （现象）. Dr Janice Foster explains that we add huge 6 of extra carbon dioxide to the atmosphere by burning fossil fuels. From the second 7 （图表）and the discovery of Charles Keeling, all scientists believe that the burning of more and more fossil fuels has resulted 8 the increase in carbon dioxide. Greenhouse gases continue to build up. Some think that the trend would be a 9 (灾难). On the other hand, George Hambley 10 (声明) that more carbon dioxide would encourage a greater range of animals and bring us a better life.
答案：1.compared 2.that 3.global 4.rather 5.phenomenon
6.quantities 7.graph 8.in 9.catastrophe 10.states
2课文大意概括 （旨在训练用30个单词概括大意的能力）
阅读课文，试着用30来个单词概括课文大意或翻译下面短文。
通过文章我们得知，地球的温度正在上升。它也给我们展示不同的想法和根据数据图表分析全球气候变暖的原因，地球的温度和增加可能造成的影响。
From the passage we know that ______________________________________________________
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答案：From the passage we know that the temperature of the earth is rising. It also shows us different ideas about global warming and analyzes the causes of the earth’s increased temperature and the possible effects according to the data from the graphs.
3课文佳句背诵与仿写 （旨在培养对难句的理解和运用能力）
1.【原句】There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon. 毫无疑问，地球是在变暖，而地球变暖正是人类活动导致而成，并非是一种无规律的自然现象。
[模仿要点] 句子结构：there is no doubt that … and that… 句式 + it is …that 强调句
【模仿1】毫无疑问，圣诞节的庆祝活动是一个很好的学习方式的西方文化;而且庆祝圣诞节，让我们的生活更有趣。
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答案：There is no doubt that the celebration of Christmas is a good way of learning the western culture and that it is the celebration of Christmas that makes our life more interesting.
【模仿2】毫无疑问，太多的电脑游戏会对学生的健康有不良影响，而且玩电脑太多花费他们太多的时间导致花在学习上的时间太少。
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答案：There is no doubt that too many computer games can have a bad effect on students’ health and that it is playing too much computer that costs them too much time resulting in too little time on study.
2．【原句】Some byproducts of this process are called “greenhouse” gases, the most important one of which is carbon dioxide.这个升温过程的一些副产品就叫做“温室”气体，其中最重要的是二氧化碳。
[模仿要点] 句子结构：主句,+ the most + adj. of + which 引导的定语从句
【模仿1】一些可能的措施应采取以防止我们的地球越来越热，而其中最重要的措施之一是限制私家车的使用。
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答案：Some possible actions should be taken to keep our earth from getting warm, the most important one of which is to limits the use of private cars.
【模仿2】一些良好的学习方法应采取以改善你的学习，而其中最有效的方法之一是与你的同学讨论。
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答案： Some good learning methods should be adopted to improve your study, the most effective one of which is to discuss with your classmates.
3. 【原句】They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.他们还赞同正是由于越来越多燃烧化石燃料导致了二氧化碳的增加。
[模仿要点] 句子结构：宾语从句中的强调句
【模仿1】文章表明是人类的活动对村庄造成的环境破坏。
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答案： The passage indicates that it is human’s activities that has resulted in the environmental destruction to the village.
【模仿2】我们都同意的是年轻一代应该负起振兴国家的责任。
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答案：We all agree that it is the younger generation that should take up the responsibility to build up the country.
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