book6uni4 Learning about language.ppt

2.Go over the new words and phrases in the previous sections. Then complete each sentence with one of those new words or phrases. 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. 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 __________ . 4. Many scientists believe that global warming has __________ through the burning of fossil fuels. 5. The _____________ of a rising sea level would be widespread flooding. 6. On the whole the warming of the earth is a ____________that causes great in concern. 7. The ________ shows temperature changes during the 20th century. 8. One hectare of forest can absorb 23 tons of carbon dioxide ____ year. 10. The car accident on the main road yesterday _________ one driver’s death. 1. Compare the two sentences below. The second sentence is from the article. Translate them into Chinese and then discuss any difference in meaning and form. Can you explain why “it” is use in the second sentence? Answer key for Exercise 1: It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. (They also believe) it is the burning of more and more fossil fuels that is resulting in this increase in carbon dioxide. Exercise 2: Rewrite each sentence with it is … that /who… to give more emphasis to the underlined part. 1. Scientists warned that greenhouse gases would warm the earth by trapping heat energy in the atmosphere. It was scientists who/that warned that greenhouse gases would warm the earth by trapping heat energy in the atmosphere. 2. The greenhouse effect gives the earth’s surface the average temperature of 15℃. It is the greenhouse effect that gives the earth’s surface the av