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1、Unit 13 Were trying to save the earthSection B 2 (3a-Self Check)I. Revision(1) Write down these phrases. 停止乘小汽车 回收纸用纸巾 好好利用用垃圾建造房 倒置经营小生意 回复，归还旧玻璃瓶 拆下一个有创意的大脑 开一个小店更受欢迎的作品 给他人带来欢乐(2) Talk about 2b with your partner.II. Presentation(1) What should we do to save the earth?Turn off the lights when we l
2、eave a room.Take our own bags when shopping.Ride a bike.Recycle paper.Dont use paper napkins.(2) What should governments do to save the earth? They should close down the factories that put waste into the river.Set up a lot of dustbins on the street.Stop people from using wooden chopsticks, plastic b
3、owls and bags.Organize people to clean up the streets and rivers.III. Writing (1) Work on 3a. Which parts of the town/ city have a nice environment? Why are they nice? Which parts need to be improved? Why?Good environment Why Bad environment Why Fill in the chart about your city.(2) Work on 3b.Write
4、 a letter to the city major about the problem and your suggestions. In your letter, describe the environmental problems in your town/city. What are the problems? Where are they? What or who is causing these problems?Then, give suggestions or possible ways to solve the problems. I think that We shoul
5、d/ could I suggest本次写作内容是一封书信,信中首先要介绍你所在城市存在有哪些环境问题，是谁造成的这些问题，然后提出解决这些环境问题的方法和措施，可以结合3a中列举的问题和前面学过的解决办法来完成这封信。 One possible version Dear Sir/ Madam, Environmental problems are becoming more and more serious all over the world. With the development of the society, there are too many cars on the stree
6、ts in our city. Cars have made the air unhealthy for people to breathe. Black smoke and poisonous gas are given off by factories. Factories also put waste into the river. And wherever we go, we can find rubbish.Now more and more people have realized these problems. I think that governments should cl
7、ose down the factories and develop laws to stop people from driving cars every day. I suggest everyone in this town should help to clean up the river and the streets. We should call on everyone in the town to throw rubbish in the dustbins. I hope the problem will be solved in the near future and our
8、 home will become better and better. IV. Self Check1. Write different forms of the words. Then add more to each group. v. n. pollute - act - protect- inspire -build - create - farm - sing -travel- drive - run - write -n. adj.fame - wood - science- health -south - care - rain - cloud-luck - help - co
9、lor - day -adj. n.sunny - noisy - harmful - beautiful -different - important- woolen -adj. adv.slow - wide - sudden - real -quick - true - possible- happy -loud - quiet - heavy - easy -angry- good -2. Match each statement with the grammar structure.Statement Grammar The river used to be so clean.Pre
10、sent progressiveWe have seen many changes in the environment.Modal verbsPeople should take public transportation more.Passive voiceThe river is polluted by factories.used to The air pollution is getting worse and worse.Present perfect3. Write ways to cut down on these kinds of pollution.Kinds of pollution Ways to cut downwater pollutionland pollution noise pollutionair pollutionV. HomeworkFinish your passage of 3b.
