3. Listen and answer: What were the lectures at the conference about? They were about pollution, agriculture, nuclear waste, radiation and the world’s population.

4. Read the dialogue carefully and answer the following questions: 1. Why was the conference called “Saving the earth”? 2. What do you think causes damage to the earth? 3. What did Jackie do at the meeting? 4. What must we do to stop pollution? 5. What is the population of China now? What is the population of the world today? 6. Do you think we should control the increase of population? Why? 7. What will happen if we do not pay attention to the problem of population and pollution ?

5. 1. Why was the conference called “Saving the earth”? Because the conference was all about the damage that is being caused to the world. 2. What do you think causes damage to the earth? Air pollution, water pollution, nuclear waste, radiation, the increase of the world’s population and so on. 3. What did Jackie do at the meeting? He listened to lecture about pollution, agriculture, nuclear waste, radiation and so on. He also listened to a good talk about the increase in the world’s population.

6. 4. What must we do to stop pollution? We must do something to stop people polluting the seas and rivers. We must think of ways of changing people’s habits. And we must also pay special attention to the population problem. 5. What is the population of China now? What is the population of the world today? China has a population of 1.2 billion. There is a population of 5.6 billion in the world.

7. 6. Do you think we should control the increase of population? Why? Yes, I think so. If the population keeps growing so quickly, there will be standing room left for us next century. 7. What will happen if we do not pay attention to the problem of population and pollution? If we don’t pay attention to the problem of population and pollution, they will cause even greater damage to the world.

8. Some language points: 1.What is the conference like? 会议开得怎么样？ What do you think of the conference? How do you like the conference? What/how about the conference? What is /was …… like? 用来询问某人 / 事等 留给人的印象, 要求对方作出简单的评价. “ 他是个什么样的人 ?” “ 他高大英俊.” What’s he like? He is tall and handsome. 也可译成：

9. sb. sth=cause sth to sb. sb. to do sth. sth. to be done He kept working/ went on working till midnight though he was tired. 3. keep doing sth.=go on doing sth.=continue doing sth. What caused the accident? keep on doing sth. =do sth.continuously,or repeatedly He keep on coughing. Pollution causes the damage to the earth. What causes the plants to die? 2. cause sth.

10. 4. be fit for sth. / be fit to do sth. 适合, 能胜任 She is fit for the job=she is fit to do the job. The fish is fit to eat. She isn’t fit to be a nurse. pay no/little/much/special attention to 没留意 / 很 少注意 / 非常注意 / 尤其注意 draw/get/attract/catch one’s attention 吸引注意力 hold one’s attention 集中注意力 5. pay attention to 注意，专心

11. 2Practice : (suggested answers) If we go on catching all the small fish, there will be no fish left in the sea. If we go on killing wild animals,there will be none left for us to study. If we go on having large families,there will not be much room left. If we go on cutting down forests, we’ll turn the land into a desert. If we go on polluting the rivers, we’ll kill all the fish.

12. 1. If the population goes on increasing, there will not be enough food for all of us. 2. You must keep the windows open if you use gas for cooking. 3. If he goes on bleeding, first of all you must try to stop the bleeding and then send him to hospital at once. 4. You may/can read this book if you want to learn some knowledge about first aid. 5. If he has stopped breathing, you must/should give him first aid at once. 6. If we throw waste into the sea,the water will be polluted. 7. If the air is polluted, many animals and plants will die. 8. We will get sick if we eat polluted fruit.

13. 1.What was the conference like? 2.give sb. a lecture on radiation 3.cause damage to the world 4.The river isn’t fit/unfit for us to live in. 5.She is fit for the job./She is fit to do the job. 6.The suit fits me well. 7.We have got to do something about pollution. 8.What else did you hear about at the meeting? 9.pay special attention to 10.turn the land into a desert