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课件网) Unit 2 Saving the Earth Topic 2 All these problems are very serious Section D 1. 老师在课堂上建议大家要尽最大努力保护环境，他会这样说： We should _____. 2. 你认为每个人都应该节约用水并且多种树，你可以这样呼吁： Everyone should _____. 3. 看到Jim在看报纸，你想知道上面是否有一些新的东西，你可以这样问他： _____, Jim? try/do our best to protect the environment save water and plant more trees Is there anything new in the newspaper 课前检测 4. 班长告诫大家不要在教室随处吐痰，他会这样说： Don’t _____. 5. 你想知道许多肥沃的土地变成沙漠的原因，你可以这样问： Why has _____? spit anywhere in the classroom (so) much rich land changed into dessert 课前检测 say, should, stop The old man said the man should stop cutting down the tree. everyone, care for Everyone should care for wild animals. 课前检测 ask, daughter The woman asked her daughter not to pick flowers. although, none, late Although it rained heavily, none of them were late for school. 课前检测 so far, thousands of So far, thousands of trees have been planted. So far, people/they have planted thousands of trees. 课前检测 water pollution Pre-reading Imagine if there is no water on the earth, what will happen? We should value the water and save the water. What should we do? 1a Read the passage and put the following paragraphs in the correct order. ( ) The sea seems to have the best answer. There is plenty of water in the sea. But we need to take the salt away from the sea water. This is very expensive. If scientists can find cheaper ways to do it, we can solve the problem of the shortage of water. ( ) How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do? ( ) Although the world is hungry, it is even thirstier. While nearly ? of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground. 1 2 3 While-reading 1b Read 1a again and answer the questions. 1.Why is our world thirsty when ? of the earth is covered with water ? 2. What can we do now to avoid the water shortage? Because about 97% of the water on the earth is sea water, we can't use it for watering plants or drinking directly. First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. 3.What will be the best way to solve the problem in the future in the passage? 4.Do you know any other ways to solve th ... ...
