【正文】 o believe that to insist that to warn that 2. Look at these sentences from the text and explain why the underlined verbs are not the same tense as the reporting verbs. 1) Recent reports from the IPCC warned that global warming will cause dramatic climate changes. 2) Scientists found that the temperature of the Earth is controlled by greenhouse gases. because it is in the future because it is a general truth 轉(zhuǎn)述結構 在轉(zhuǎn)述他人的話、觀點或看法時，常常使用轉(zhuǎn)述結構，轉(zhuǎn)述結構也叫間接引語。 結構分析： 這是一個主從復合句， given this data是過去分詞作條件狀語，相當于when we are given this data。賓語從句中的現(xiàn)在分詞短語 facing the 21st century在句中作定語，修飾前面的名詞environmental problems。而破折號后面的內(nèi)容則是前面 changes的一個同位語，對 changes作補充說明。 they call this the ―greenhouse effect‖. The Greenhouse Effect Raising the Earth’s temperature will cause substantial melting of the polar ice caps which will then lead to a rise in the sea level and subsequent flooding of lowlying areas. Global warming will also change countries’ climates and cause huge food and water shortages. There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money. Which countries do you think contribute more to global warming? a) developed countries b) developing countries Developed countries – more industry and techn logy. Part II Reading Can we take the heat? 1. Scan the text below for these words and work out their meanings. consensus bounce agriculture coincidence ?a remarkable concurrence of events by chance ?move quickly up, back, or away from a surface after hitting ?a general agreement ?the science or practice of farming condemn reservation sacrifice advocate ?the action of reserving something ?to remend or support publicly ?to give up (something important or valued) because of other considerations ?sentence to a particular punishment, especially death 1) The main purpose of the first paragraph is __________. A. to introduce the topic of global warming to the readers B. to remind the readers of human activities in the past C. to introduce the greatest trouble in the future D. to mention the process of global warming in history 3. Choose the best answer to each question according to the text. Answer: A 2) Which of the following is TRUE about greenhouse gases? A. Greenhouse gases will only do us harm. B. Greenhouse gases do more harm than good to humans. C. Greenhouse gases do more good than harm to humans. D. Proper greenhouse gases are quite necessary to the earth. Answer: D 3) Which of the following is NOT mentioned as the result of global warming? A. Typhoons. B. Serious diseases. C. Polar ice melting. D. Heat waves. Answer: A 3. Read the text quickly and answer the questions. 1) What is global warming? 2) What human activities are causing global warming? Global warming is an average increase in the Earth’s temperature that leads to climate change. Industry, agriculture, the cutting down of forests, the increase in transport and the burning of fuels are causing global warming. 3) By how much has the global average temperature increased in the last 10 years? 4)Are greenhouse gases necessary for life on Earth? By 1176。 F ( one degree Fahrenheit). Yes, they are, because they trap heat from the sun in the Earth’s atmosphere. Otherwise the Earth would be cold and unsuitable for life. 5) How can we help solve the problem of global warming? We can make small changes like taking public transport, recycling, using lowflow shower heads, and buying energyefficient light bulbs to help stop global