Unit 13 We’re trying to save the earth!
一、教学目标： 1. 语言知识目标
基本词汇：litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic,
takeaway, bin, shark, fin, method, cruel. Harmful, chain, ecosystem, industry, law, scientific, afford, reusable, transportation, recycle, napkin, upside, gate, bottle, president, inspiration, iron, work, metal, creativity,
基本词组：be harmful to, at the top(of sth.), take part in, turn off, take action, throw
away, put sth. to good use, pull… down, bring back
基本句型：We’re trying to save the earth! The river used to be so clean. The air is badly polluted.
No scientific studies have showed that shark fins are good for health. We should help save the sharks.
2. 技能目标: 能正确运用现在进行时，现在完成时，被动语态，情态动词和used
to 句型。
3. 情感目标: 有环境危机意识，学会关注环境保护环境。 二、教学重难点：
1. 教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词
和used to 句型。
（2）保护环境的措施方法。
2. 教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。三、教学步骤:
Section A 1 (1a-2d)
I. Presentation
Show the picture of the earth and tell students the earth is polluted now.
For example: (1) The factories that burn coal pollute the air with a lot of black smoke.
(2) Factories put waste into the river. (3) People should throw away litter in the bin. (4)There are more cars on the road.
II. Learning
Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.
loud music cars rubbish planes littering ships factories smoking building houses mobile phones noise pollution air pollution water pollution ____________ ___________ _____________ ____________ ___________ _____________ ____________ ___________ _____________ ____________ ___________ _____________
Keys : noise pollution loud music planes mobile phones building houses
air pollution factories smoking cars building houses water pollution ships rubbish littering factories III. Listening
1. 1b Listen and complete the sentences. What was the problem? The river was _____________. Even the bottom (底部) of the river was full of ________. There were no more ______ for fishermen (渔民) to catch. What caused the problem? People are throwing _______ into the river. Factories are putting ______ into the river. How should the problem be solved? We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river. Keys: really dirty rubbish fish litter waste government
close down clean up
2. Listen again and check (√) the sentences you hear. 1) We could go fishing in the river. 2) The river was really dirty.
3) The river has always been the nicest river in this town. 4) We should ask the teachers for help. Keys: 2 3 IV. Practice
1. Role-play the conversation in 1c.
Mark: The river was dirty. Even the bottom of the river was full of rubbish. Tony: But it used to be so clean!
Mark: Yes, but people are throwing litter into the river. Tony: Everyone in this town should play a part in cleaning it up! 2. Make conversations using the pollution in 1a. A: The river has always been the nicest river in this town. B: Yes, it used to be so clean.
A: But I was there last weekend and the river was really dirty. B: What caused the problem?
A: People are throwing litter into the river. B: What should we do?
A: Factories are also putting waste into the river. B: Yes, everyone in this town should play a part.
A: We should write to the government and ask them to close down the factories. B: What else can we do?
A: Everyone should help to clean up the river. V. Language points
1. We’re trying to save the earth! 我们正在竭尽全力拯救地球! try to do =try one’s best to do 努力去做某事。
e.g. Every student should try to study hard in order to study in a university.
为了进入大学学习，每个学生都应该努力学习。 2. Here are some words related to different kinds of pollution. be related to 与…有关
e.g. I am not related to him in any way. 我和他无任何关系。 3. Everyone in this town should play a part in cleaning it up! play a part in 在……方面起作用
e.g. A good diet plays a large part in helping people live longer. 健康的饮食在帮助人们长寿方面起着非常大的作用。 play a part 在……中扮演角色
e.g. He was invited to play a part in this TV play. 他被邀请参加这个电视剧的演出。 4. Even the bottom of the river was full of rubbish. Yes, but people are throwing litter into the river. litter 和 rubbish 都可指“垃圾”，用作不可数名词。
rubbish 指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。
litter 指“(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)”还可回收
e.g. Throw the rubbish out. 把垃圾扔出去。
The room is full of rubbish. 房间里堆满了垃圾。
Pick up your litter after a picnic. 野餐后将废弃物收拾好。 VI. Listening
1. 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about.
A. land pollution B. air pollution C. noise pollution D. water pollution Keys: B A
2. 2b Listen again and complete the sentences.
1) The air is badly polluted because there are ___________ on the road these days. 2) Factories that burn coal also ________ the air with a lot of black smoke.
3) There is also too much rubbish and waste. People _________________ things