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1、,Unit 4 Global warming,Discovering useful words and expressions,Discovering useful words and expressions (P28),Go over the new words and phrases in the previous sections. Then complete each sentence with one of those new words or phrases.,2,1. Charles Keeling collected _on the carbon dioxide content
2、 in the atmosphere over a forty-year period. He found that the amount of carbon dioxide _ increasing during that time.,data,kept on,2. Although we are burning coal in huge _ every year, we wont _ of it for centuries. 3. If the amount of greenhouse gases continues to _, we could be facing a global _.
3、,quantities,run out,build up,catastrophe,4. Many scientists believe that global warming has _ through the burning of fossil fuels.,come about,5. The _ of a rising sea level would be widespread flooding.,consequence,6. On the whole the warming of the earth is a _ that causes great concern. 7. The _ s
4、hows temperature changes during the 20th century. 8. One hectare of forest can absorb 23 tons of carbon dioxide _ year.,phenomenon,graph,per,9. The washing machine uses too much energy, but _ we buy a more economical one, it would still use too much water. 10. The car accident on the main road yeste
5、rday _ one drivers death.,even if,resulted in,由it引导的强调句结构： It is (was)+被强调部分+that (who) + 句子其他部分 注意：此结构强调的成分仅限于主语，宾语和状语。,Explanation,如： 原句：My father did the experiment in the lab yesterday evening 强调主语：It was my father who/that did the experiment in the lab yesterday evening,强调宾语：It was the experime
6、nt that my father did in the lab yesterday evening 强调时间：It was yesterday evening that my father did the experiment in the lab,强调地点：It was in the lab that my father did the experiment yesterday evening e.g. It was in that city that we met for the first time It was not until he told me that I knew the
7、 truth,典型例题分析： 1) It was last night _ I saw the film Star Wars A. who B. when C. that D. which,C,答案C 强调句的结构是：It + be + 强调部分 + that (who) +主谓句。强调句的连词只有两个，that和who。当强调的部分是人，且为句子的主语时，才用who，其余用that。,2) It is ten years _ Miss Green returned to Canada A. that B. when C. since D. as 答案C 考点是连词用法。本题易误选为A其实本句
8、不是强调句。,若是去掉It bethat还应是一个完整的句子。而本句去掉It isthat, 只剩下ten years Miss Green returned to Canada不成句。因此本句不是强调句。It is + 时间+since.，其中 is = has been.,1. It was this village _ I was bought. A. where B. that C. on which D. which,练习 I,2. It was in this village _ I was bought up. A. where B. that C. on which D. wh
9、ich,3. - Was it under the tree _ you were away talking to a friend? - Sure. But when I got back there, the bike was gone. A. that B. where C. which D. while,II. 根据下列各句句意及所给单词的首字母或汉语提示, 写出各单词的正确形式。 1. The organization has been in e_ for 25 years. 2. What is the a _ rainfall for August in your country
10、? 3. The earthquake caused a w _ damage to the area. 4. With the development of technology, people are more and more familiar with _ (外部的) space.,outer,xistence,verage,idespread,III. 每空填一词, 使该句与所给句子的意思相同。 1. We depend on energy to do many things. _ _ energy _ we depend on to do many things. 2. He di
11、dnt go to school because he was ill. _ _ because he was ill _ he didnt go to school.,It is,that,It was,that,3. My father didnt return until 11 oclock last night. _ _ _ _ 11 oclock _ my father returned last night. 4. David bought a walkman from a store yesterday. _ _ David _ bought a walkman from a s
12、tore yesterday.,It was not until,that,It was,that / who,5. The mountain climber was rescued with the help of the local people. _ _ with the help of the local people _ the mountain climber was rescued. 6. Her uncle moved out of the city and settled down in a small village for this reason. _ _ for thi
13、s reason _ her uncle moved out of the city and settled down in a small village.,It was,that,It was,that,7. What on earth do you want me to say? _ _ _ _ you want me to say? 8. I didnt receive the managers reply until nearly a month later. _ _ _ _ nearly a month later _ I received the managers reply.,
14、What is it that,It was not until,that,9. Marx met Tracy in Pairs in 1845. _ _ in Pairs _ Marx met Tracy in 1845. 10. The football match had to be called off because it rained heavily. _ _ because it rained heavily _ the football match had to be called off.,that,It was,that,It was,IV. 根据括号内的提示将下列句子翻译成 英语。 总的来说，我很喜欢这本书。(on the whole) 2. 昨天的平均温度是28摄氏度。(average),On the whole, I like this book very much.,The average temperature yesterday was 28C.,Make four sentences with “it” for emphasis.,Homework,
