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1、Unit 4 Global warmingDoes It Matter?一、语法填空(根据课文内容、依据语法规则完成下面短文）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 its human activity 2_ has caused this global warming rather 3_ a random but na
2、tural phenomenon. Dr. Janice Foster explains that we add huge 4_ of extra carbon dioxide into the atmosphere by burning fossil 5_. From the second 6_ and the discovery of Charles Keeling, all scientists believe that the burning of more and more fossil fuels 7_ (result) in the increase in carbon diox
3、ide. Greenhouse gases continue to build up. On the one hand, Dr. Foster thinks that the trend would be a 8_. On the other hand, George Hambley 9_ (state) that more carbon dioxide would encourage a greater range of animals and bring us 10_ better life.参考答案：一、1. compared 2. that 3. than 4. quantities/amounts 5. fuels 6. graph7. has resulted8. catastrophe9. states10. a- 2 -
