幻灯片 1 高二选修6 Unit 4 ---- 幻灯片 2Discovering useful words and expressions ---- 幻灯片 3Discovering 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 ---- 幻灯片 41. Charles Keeling collected ______on the carbon dioxide content in the atmosphere over a forty-year period. He found that the amount of carbon dioxide _______ increasing during that time. data kept on ---- 幻灯片 52. Although we are burning coal in huge _________ every year, we won’t ________ of it for centuries. 3. If the amount of greenhouse gases continues to _______, we could be facing a global __________. quantities run out build up catastrophe ---- 幻灯片 64. 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 ---- 幻灯片 76. On the whole the warming of the earth is a ____________ that causes great concern. 7. The __________ shows temperature changes during the 20th century. 8. One hectare of forest can absorb 23 tons of carbon dioxide ____ year. phenomenon graph per ---- 幻灯片 89. 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 yesterday ___________ one driver’s death. even if resulted in ---- 幻灯片 9 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 ---- 幻灯片 10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． ---- 幻灯片 11强调宾语：It was the experiment 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． ---- 幻灯片 12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 truth． ---- 幻灯片 13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 ---- 幻灯片 14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。 ---- 幻灯片 152) 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其实本句不是强调句。 ---- 幻灯片 16 若是去掉It be…that还应是一个完整的句子。而本句去掉It is…that, 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. ---- 幻灯片 171. It was this village ___ I was bought. A. where B. that C. on which D. which 练习 I ---- 幻灯片 182. It was in this village ___ I was bought up. A. where B. that C. on which D. which ---- 幻灯片 193. --- 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 ---- 幻灯片 20II. 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? 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 existence average widespread ---- 幻灯片 21III. 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 didn’t go to school because he was ill. __ ____ because he was ill _____ he didn’t go to school. It is that It was that ---- 幻灯片 223. My father didn’t return until 11 o’clock last night. ___ ___ __ ______ 11 o’clock ______ my father returned last night. 4. David bought a walkman from a store yesterday. __ ____ David _________ bought a walkman from a store yesterday. It was not until that It was that / who ---- 幻灯片 235. 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 this reason ______ her uncle moved out of the city and settled down in a small village. It was that It was that ---- 幻灯片 247. What on earth do you want me to say? ____ _ __ ___ you want me to say? 8. I didn’t receive the manager’s reply until nearly a month later. ___ ___ ___ ____ nearly a month later ____ I received the manager’s reply. What is it that It was not until that ---- 幻灯片 259. 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 ---- 幻灯片 26IV. 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 28°C. ---- 幻灯片 27Make four sentences with “it” for emphasis. Homework ----
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