Unit 13

We are trying to save the earth.

serious pollution

We are harming our planet in so many ways.

伤害

air pollution

noise pollution

water pollution

Factories pour dangerous gases into the air.

Cars also pour dangerous gases into the air.

tail gastail gas

air pollution!The weather is always foggy. We can’t see the blue sky. We can’t breathe the fresh air. Do you know why?

Factories produce too much dangerous smoke. The traffic produces too many fumes( 烟雾） . Some people smoke in public places.

Dad, what’s the acid

rain?

Natural resources are disappearing at a dangerous rate. 以危险的速度

Group One Group Two Group Three

desert extinct

Help save the earth We must think of better way to treat our planet in future.

What do you usually do ?Are you a friend of the Earth? Take this quiz.

START

You drink a can of cola. What do you do?

I throw away cans.I throw away cans.

I recycle cans.I recycle cans.

You throw away the cans. That’s bad for the Earth.

You recycle the cans.That’s good for the Earth.

There are a lot of old newspapers at your home. What do you do?

I throw the old newspapers away.I throw the old newspapers away.

I recycle the old newspapers.I recycle the old newspapers.

You throw old newspapers away.You waste paper.That’s bad for the Earth.

You recycle old newspapers. You save paper.That’s good for the Earth.

You go shopping. What do you do?

I use a lot of new plastic bags.I use a lot of new plastic bags.

I use my own bag.I use my own bag.

You use a lot of new plastic bags. That’s bad for the Earth.

You use your own bag.That’s good for the Earth.

When you write on a piece of paper, what do you do?

I write on one side only.I write on one side only.

I write on both sides.I write on both sides.

You use paper on one side only.That’s bad for the Earth.

You use paper on both sides.That’s good for the Earth.

• close down the factories;• help to clean up the river;• take the bus or subway;• ride a bike;• bring a bag to go shopping, throw rubbish in

the bins;• turn off the lights when you leave a room;• use paper or resusable bags;• recycle books and paper;• turn off the shower when you wash your hair;• don't use napkins;• rethink,reuse, recycle ... ...

基础预习写出下面单词的意思litter________ bottom________fisherman_________ugly__________cost________plastic________coal_______advantage_______wooden_______

把下面的短语与汉语意思连起来。

make a diffenencecut downlead to be full of play a part in

导致起作用减少参与充满

Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.

1a

loud music cars rubbish planes

littering ships factories smoking

bulding houses mobile phones

noise pullotionair pollution water pollution

cars, factories, smoking, building houses

Loud music, planes, building houses, mobile phones

rubbish, littering, ships, factories

Listen and complete the sentences.1b

what was the problem?

The river was _________. even the bottom of the river was full of ________. there were no more _____ for fishmen to catch.

really dirty

rubbish

fish

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.

litter

waste

governmentclose down

clean up

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 littering in the river.Tony: Everyone in this town should play a part in cleaning it up!

Role-play the conversation. Then make your own conversations about the kinds of pollution in 1a.

1c

2a Listen to the interview. Circle the kinds of pollution that Jason andSusan talk about.

A. land pollution B. air pollution C. noise pollution D. water pollution

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 away every day.

4. People are also littering in____________ like parks. Th is turns beautiful parks into ugly places.

more carmore carpollutepollute

are throwing awayare throwing away

public placespublic places

2b Listen again and complete the sentences.

Jason: The air has become really polluted around here. I’m really getting worried.Susan: Yes, I used to be able to see stars in the sky.Jason: The problem is that ...

Use the information in 2a and 2b to role-play conversations between Jason and Susan.

2c

Interviewer: Jason and Susan, what are your

ideas for solving these problems?

Jason: Well, to cut down air pollution, we should

take the bus or subway instead of driving.

Susan: Yeah, or ride a bike. Other advantages of

bike riding are that it’s good for health

and it doesn’t cost anything!

2d Role-play the conversation.

Interviewer: Great ideas! What about waste pollution?Susan: Mmm, I think simple things like bringing a bag to go shopping can help. I started doing that a year ago.Jason: Me, too. Also, I never take wooden chopsticks or plastic forks when I buy takeaway food. I use the ones at home.

Susan: And remember to throw rubbish in th

e

cans and keep public places clean and

beautiful for everyone.

Interviewer: So together, our actions can

make a difference and

lead to a better

future!

辨析： turn, get 与 become

(1) become 多指身份，职位等的变化，它强调变化过程已经完成，后面可以接名词或者形容词。 He becomes a teacher.

(2) get 多用于口语，表示一种变化过程，强调的是“渐渐变化”后常接形容词的比较级

形式。

Language Points

In winter the days get shorter. 冬天白天渐渐变短。(3) turn 指的是在颜色和性质等方面与以前

的完全不同，强调变化的结果。 leaves turned brown in the mountains. 山里的树叶已经变成了棕色。 ：Her mother ______ angry when she heard

the news.It's _____ darker and darker outside.The milk has ______bad.

became

gettingturned

cut down, 意为 " 减少 " ； 是“动词 + 副词”结构的短语，后面所带的宾语为名词时，宾语可以位于 down 的前面或后面；为代词时只能位于 down 前面。

You'd better cut the article down to about 2000 words.

cut 后接 off, into,up, in 的不同：cut off 切断；切除cut into 把 ...切成 ...

cut up 切碎cut in 插队

花费 主语 表示内容

spend 人 宾语可以是钱，精力，时间等。

cost 物或事后接 life ， money ，health ， time 等，侧重与花费的代价

take 事或人 说明事情完成花费了 ...

辨析： spend, cost, take, pay

花费 主语 表示内容

pay 人

" 支付 " 作为及物动词，可以是 pay sb 或 pay some money ；作为不及物动词，形式为 pay for 。for 表支付的原因。

1. Do you take exercise everyday?

Yes, I always ___ thirty minutes after supper.

A spend B cost C take D pay

2. I ____ 300 yuan for the bike.

A took B spend C cost D paid

用方框中所给词的适当形式填空。

1. Don't throw _______(垃圾 ) everywhere.2. In winter, many people burn ______(煤 ) to keep warm.3. The police found a body at the ________(底部 ) of the lake.4. The ______(花费 ) of living in big cities is very high.5. He keeps a rabbit in a big _______(木制的 ) box.

cost wooden, coal , bottom, litter

cost

wooden

coal

bottom

litter

1. He ___ go out with his parents, but now

he _____ stay at home alone.

A. use to; is used to B. is used to; used to

C.use to; used to D. is used to; is used to

2. The interesting book ___ me 10 yuan.

A. took B. paid

C. spend D. cost

Choose the best answer.

3. We must do something useful to ___ p

ollution.

A. cut off B. cut up

C. cut down D. cut in

4. Smoking can ___ lung cancer. you'd b

ettter give it up.

A ． work on B ． lead to

C ． take away D ． put out

5. What are the ___ of bike riding?

-- It can help cut down air pollution.

A ． advantage B ． reasons

C ． results D ． ideas

1. 多一个人少一个人无所谓。 One person wouldn’t ____ ____ __________. 2. 这个木箱时装满了书。The _______ box ____ ____ ____ books. 3. 不健康的饮食对这种疾病的传播起一定的作用。 Unhealthy foods ___ ___ ___ ___ the spread of th

e disease. 4. 这条小路通向公园。 The path ____ ____ the park. 5. 我错拿了你的包。 I took your bag _____ ____ mine by mistake.

wooden is full of

make a difference

lead to

paly a part of

instead of