资源简介

(共49张PPT)
Unit 2 Saving the Earth
Topic 1 Pollution has caused too many problems .
Section C
On Monday last week, Kangkang, Michael, Jane and Maria ________ __ _______ for Sunday. Kangkang ________ to go to the West Hill, because he _____ _____ there before. He _____ there two years ago. It was a very beautiful place with lots of ________ and ______. The air was _____ and the water was______, and he could see _____ and___________ _________.
planned a picnic
advised
has been
went
flowers grass
fresh
clean
bees
butterflies dancing
However, when they get there on Sunday, they find that everything ____ _________. The flowers and grass _____ _____. The water is so ______ and it _______ ________. There are some _________ ________ ________ ______ water _____ the stream. The West Hill is in a terrible ______ now and it is not _____ beautiful _____before. They won’t have a picnic there ____ ______. What a _______!
has changed
have gone
dirty
smells terrible
chemical factories pouring waste
into
mess
as
as
any more
shame
With the development of the world,
pollution is almost everywhere.
air pollution
light pollution
water pollution
soil pollution
n. 土壤，土地
noise pollution
litter
3a Look at the pictures and read the words and phrases, paying attention to the sounds and stress.
light
pollution
soil
pollution
water
pollution
noise
pollution
air
pollution
litter
People use chemicals too much in their fields, so ____________causes unhealthy food.
People pour waste water into rivers and lakes, so ________________is almost everywhere in China.
______________makes people sick. It causes breathing problems and even cancer.
In some cities, there’s too much ______________caused by many cars.
________________is harmful to birds./Also, /when we use too many lights at night, we waste energy.
_______ makes a mess of our environment, /so people shouldn’t throw it around.
soil pollution
water pollution
Air pollution
noise pollution
Light pollution
Litter
3b
chemical
[c]n. 化学制品
chemical factories
adj. 化学上的
chemistry
化学
People use chemicals too much in their fields, so ____________causes unhealthy food.
People pour waste water into rivers and lakes, so ________________is almost everywhere in China.
______________makes people sick. It causes breathing problems and even cancer.
In some cities, there’s too much _______________ caused by many cars.
________________is harmful to birds./Also, /when we use too many lights at night, we waste energy.
_______ makes a mess of our environment, /so people shouldn’t throw it around.
soil pollution
water pollution
Air pollution
noise pollution
Light pollution
Litter
3b
3a Look at the pictures and read the words and phrases, paying attention to the sounds and stress.
light
pollution
soil
pollution
water
pollution
noise
pollution
air
pollution
litter
Noise is a _____ of pollution.
sort
noises made by
piano
cat
wind
bus
machine
children
loud music
What can make noises
1. Underline the topic sentence of the passage in 1a.
Try to find out the topic sentence to understand the content of a paragraph.
1C Read 1a and complete the following tasks.
Task 1
Noise is also a kind of pollution and is harmful to humans’ health.
How does it harm people’s health
It makes people feel uncomfortable and unpleasant.
It does great harm to people’s hearing.
It may cause hearing loss.
/l s/
It makes people lose their hearing.
It makes people go deaf.
2. How does noise harm people’s health
Task 2
a. People often ____ ______.
b. People often feel ____________ and
__________.
c. People may become _____ or _____.
d. Your point:
_____________________________.
go deaf
uncomfortable
sick
unpleasant
deaf
3. Which phrase has the same meaning as “is
harmful to”
4. Which sentence shows that many teenagers’
hearing in America is not good
5. Why is the hearing of many young Americans
not good
Task 3
Answer the questions.
“do harm to”.
Many teenagers in America can hear no better than 65-year-old people do.
Because they always listen to loud pop music.
1a Read and understand
1. produce A. to hurt someone
2. deaf B. a type or a kind
3. print C. not be able to hear
4. harm D. to grow or make
something
5. sort E. to put words or
pictures onto paper
using a machine
1b Read 1a and match the words with their meanings.
In today’s world, almost everyone knows air
pollution is harmful to people’s health. However, not all
people know noise is also a kind of pollution and is
harmful to humans’ health.
1. be harmful to sb./sth.
=do harm to sb./ sth.
在阳光下看书对我们的眼睛有害。
Reading in the sun is harmful to our eyes.
=Reading in the sun does harm to our eyes.
In today’s world, almost everyone knows air
pollution is harmful to people’s health. However,
not all people know noise is also a kind of pollution and is
harmful to humans’ health.
2. not all people 不是全部人
表示部分否定:
not + all/ both/ everybody/ everyone /everything/…
表示全否定:
none/neither/nobody/no one/nothing/…+V单
Not all people know noise is also a kind of pollution.
_____ ________ know(s) noise is a kind of pollution ____ ______.
Not everyone
Some people
as well
改写同义句
People who work and live in noisy conditions go deaf.
For example, many of the workers who print newspapers
and books lose their hearing. Quite a few people
living near airports also have hearing loss. Recently , it was
reported that many teenagers in America can hear no
better than 65-year-old people do, because these young
people always listen to loud pop music.
People who work and live in noisy conditions
often go deaf.
在嘈杂的环境中工作和生活的人容易变聋。
定语从句
Beethoven was deaf.
3. go deaf 变聋
He _____ ____ because of a traffic accident.
went deaf
deaf adj. 聋的
…many of the workers who print newspapers
and books lose their hearing.
很多印刷报纸和书籍的工人丧失听力。
定语从句
Look! The man is using the ______to _____ something.
lose one’s hearing 丧失听力
a printer
hearing n. 听力，听觉
4. print v. 印刷
printer
print
5. lose v. 失去
lost adj. 丢失的，迷路的
loss n. 损失
1）昨晚他在交通事故中丧生。
He lost his life in the traffic accident last night.
2）迷路
遗失的钱包
迷路的小孩
3) 许多人由于噪音污染患上失聪。
Many people have hearing loss because of noise pollution.
a lost wallet
a lost child
lost-lost
1）have hearing loss
2）lose one’s hearing
3）go deaf
be lost / get lost/ lose one’s way
失聪
I was very sad at the _____of my dog
He often_______ himself in reading.
He _____ his way in the snowstorm.
lost
loss
loses
Fill in the blanks with lose、 lost、 loss.
My purse is_______.
lost
People who work and live in noisy conditions go deaf.
For example, many of the workers who print newspapers
and books lose their hearing. Quite a few people
living near airports also have hearing loss. Recently, it was
reported that many teenagers in America can hear no
better than 65-year-old people do, because these young
people always listen to loud pop music.
quite a few = many
quite a little =much
Many teenagers in America can hear no
better than 65-year-old people do.
= In America, many teenagers’ hearing is
____ _____ ____ 65-year-old people’s.
6. no +比较级+than
not+ 比较级+ than
我和你一样都不高。
I’m no taller than you.
我不比你高。
I’m not taller than you.
两者都不 …
…不比…更…
as weak as
6. no better than 两者都不好; 和…几乎一样差
no +比较级+than 两者都不 …
not+ 比较级+ than
Jane跳得不如我高。
Jane didn’t jump higher than me.
Jane和我都跳不高。
Jane jumped no higher than me.
这里的环境和他家乡的一样糟糕.
The environment here is no better than that of his hometown.
这次跳高比赛, Jane跳得不比我高。
Making a loud noise in public is also a kind of pollution.
It not only disturbs others but also does great harm to
people’s hearing. Cars and machines also produce too
much noise. Such pollution makes people feel
uncomfortable and unpleasant, and it can even cause
them to become sick or deaf.
Nowadays, many countries are trying to solve all sorts
of environmental problems, including noise pollution.
all sorts of = all kinds of 各种各样的
cause sb. to do sth.
导致某人做某事
make
1a Read and understand
对人类的健康有害
相当一部分；大量
失聪
据报道
和…（几乎）一样坏
听劲爆的流行音乐
在公共场合制造太大的噪音
使他们生病或变聋
解决各种环境问题
Key phrases
对人类的健康有害
相当一部分；大量
失聪
据报道
和…（几乎）一样坏
听劲爆的流行音乐
在公共场合制造很大的噪音
使他们生病或变聋
解决各种环境问题
be harmful to humans’ health
quite a few
go deaf/ have hearing loss
lose one’s hearing
It’s reported that…
no better than
listen to loud pop music
make a loud noise in public
cause them to become sick or deaf
solve all sorts of environmental problems
2 Complete the following passage with the correct form of each word.
Noise is a kind of _________ (pollute). Cars and machines produce too much noise. It makes people feel ___________ (comfortable) and __________ (pleasant). It also does great ______ (harm) to people’s _________ (hear). Noise is very ________ (harm) to humans’ _______ (healthy).
pollution
uncomfortable
unpleasant
harm
hearing
harmful
health
Exercises
单项选择
—The little girl was born____, and she can’t hear
anything.
—Oh, I’m sorry to hear that.
A. lazy B. blind C. deaf D. lovely
2. — What happened
— There is a girl____ on the street. She couldn’t find her mother.
A. cry B. crying C. to cry D. cries
3. The ______ boy tried to climb up the tree, but he failed.
A. 5-year-old B. 5-years-old
C. 5 year old D. 5 years old
C
B
A
Exercises
用所给单词的正确形式填空。
1. They are doing their homework carefully. You’d better not ________(disturb) them.
2. It is known that smoking does great _______(harm) to us.
3. They had all _____ (sort) of juice to drink at the party last night.
4. Our government has solved some ________________ (environment) problems.
disturb
harm
sorts
environmental
Exercises
改为同义句。
1. The boy had hearing loss when he was born.
The boy ____ ____ _______ when he was born.
2. Some students go to school on Saturdays.
____ _____ students go to school on Saturdays.
lost his hearing
Not all
Has noise pollution caused you any problems If yes, share your feelings with your classmates.
What about other kinds of pollution
3 Choose one kind of pollution and discuss it in
groups. The following questions may help you.
1. What is … pollution
2. What makes the … pollution
3. What problems does it cause
4. In what way is it harmful to people’s life
5. What has been done to solve these problems
…
4 Write a short report about a kind of pollution based on 2 and 3. The topic sentence of each paragraph is given below.
… pollution is…
… pollution is harmful to people’s health…
The government has tried many ways to solve the problem…
One possible version:
Air pollution is becoming more and more serious in today’s world. Some chemical factories produce terrible gas and make the air bad. Buses and cars also produce waste gas. In our daily life, burning gas, oil and coal also creates air pollution. The air pollution may cause a lot of problems. It is harmful to people’s health. It can cause breathing problems, sore eyes and even cancer. It can also harm the plants, and the farmers will get less harvest. Luckily, the government has tried many ways to solve the problem, such as making laws to prevent the factory from polluting the air.
summary
We learn:
1. Find out the topic sentence to understand the
content of a paragraph.
2. Write a passage according to the topic sentences.
We can:
1. Some words:
deaf, print, hearing, loss, recently, disturb,sort,
uncomfortable, unpleasant, sentence, meaning
2. Some phrases:
go deaf, lose one’s hearing, hearing loss,
no better than, do harm to
3. Some sentences:
However, not all people know noise is also a kind
of pollution is harmful to human’s health.

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