仁爱科普版九年级上册Unit 2 Saving the Earth Topic 1课件(共90张PPT)

(共90张PPT)
九年级 上册
Unit 2
Saving the Earth
1. Pollution has caused too many problems.
英 语
仁爱版
1. Pollution has caused too many problems.
词性变化1．chemistry (n.)— chemical (adj.)2．pollute (v.)— pollution (n.)3．breathe (v.)— breath (n.)4．produce (v.)— production / product (n.)
Let’s review wods
5．harm (n.)— (adj.)6．lose (v.)— (n.)— (adj.)7．environment (n.)— (adj.)8．including (prep.)— (v.)9．pressure (n.)— (v.)
harmful
loss
lost
environmental
include
press
根据提示填上适当的单词完成句子。
1. Have you seen him __________(最近)
2. She was born ________ (耳聋的) .
3. The government plans to _________(创造) more jobs for young people.
4. You are w_______ your time trying to explain it to him.
5. What a s______ they couldn’t come.
recently
deaf
create
asting
hame
Ｂ）．翻译下列词组.
对…有害
砍树
更糟糕的是
对…不好
hearing loss
high blood pressure
no better than
pour…into…
be harmful to / do harm to
cut down trees
what’s worse
be bad for
失聪；丧失听力
高血压
和…一样坏
把…倒入…
Let’s review phrases
９.have got a pain in… ___________________
10.throw around ___________________
11not all people ___________________
12.go deaf ___________________
13.丧失听力 ___________________
14.和……（几乎）一样坏 ___________________
15.disturb others ___________________
16.各种各样样的
……疼
乱扔
不是所有人
变聋
= have hearing loss
lose one’s hearing
no better than
打扰别人
all sorts/kinds of
. 根据中文提示，将下列句子补充完整。
林老师去北京了，他是昨天去北京的。
Mr. Lin____ ____ ____ Beijing. He _____ there yesterday.
2. 砍树对环境有害。
______ ____ trees ____ _____ ___ the environment.
3. 他像这样有多长时间了？
_____ _____ ____ he ______ like this
4. 有一个男孩正坐在树底下。
_____ ___ a boy _______ under the tree.
5. 更糟糕的是，房间和食物都很差。
_____ ________ , the room and the food were awful.
has gone to went
Cutting down does harm to
How long has been
There is sitting
What’s worse
is harmful to
Let’s do
你可以看见蜜蜂和蝴蝶正在飞舞。
You could see bees and butterflies dancing.
2. 花儿和草都消失了！
The flowers and grass have gone.
3. 看, 有几家化工厂正往小溪里倒废水。
Look, there are several chemical factories pouring waste water into the stream.
4. 我难以呼吸。
It’s difficult for me to breathe.
5. 更糟糕的是，这家工厂制造太多的噪音，我晚上难以入睡。
What’s worse, the factory makes too much noise and I can’t sleep well at night.
Let’s review sentences
6. 自从上周开始我就已经这样了。
I have been like this since last week.
7. 污染已经导致太多的问题。
Pollution has caused too many problems.
8. 噪音对人类健康有害。
Noise is harmful to human’s health.
9. 经常工作或生活在嘈杂环境中的人们经常会变聋。
People who work and live in noisy conditions often go deaf.
10. 许多美国青少年的听力不如65岁的人。
Many teenagers in America can hear no better than 65-year-old people do.
A: Where have you been/traveled
B: I have been/traveled to ...
Let's go to class
Have you ever had a picnic
Kangkang, Jane, Maria and Michael are planning a picnic for Sunday.
They will go to the West Hill.
What can you see there
We can see bees and butterflies dancing.
bee
butterfly
Is the West Hill beautiful
Guess
a place with
beautiful flowers
Brainstorm
many hills
green trees
What a shame/mess!
The flowers and grass have gone!
The flowers and grass have gone!
Oh, my goodness. What a mess!
Look! There are several chemical factories pouring waste water into the stream.
= have disappeared.
Is it beautiful now
What has happened there
There are several chemical
factories pouring waste water
into the stream.有几家化工厂正在往小溪里排放废水。
There be…doing sth…
……有……在做某事
e.g. There are some people waiting for the bus at the bus stop.
1c Read 1a and complete the sentences in the table. Then retell 1a to your partner.
Two years ago Now
1. It was a _______________. 2. There were _______________________. 3. The air was _______________________ and you could see _______________________. 1. ___________________
have gone.
2. The water is ________and smells ___________.
3. There are several ________________ pouring _______________ into the stream.
4. _____________has changed.
beautiful place
lots of flowers and grass
fresh and the water was clean
bees and butterflies dancing
The flowers and grass
so dirty
terrible
chemical factories
waste water
Everything
2 Work in pairs. Look at the pictures and make up conversations similar to the example with your partner.
Example:
A: There were lots of flowers and grass
when I visited the village last year.
B: But now the flowers and grass have
gone.
A: What has happened here
B: The villagers have destroyed them.
lake/fish
factory/
pollute
hill/ trees
farmers/cut down
village/flowers and grass
villagers/destroy
4 Work in groups and talk about pollution in a place you are familiar with. The following sentences may help you.
…ago, it was… Now, … have/ has gone. What has happened Everything has changed. Oh, my goodness!
Read 1a,sectionB.Answer the questions.
1. Does Bruce look well
2. What’s wrong with him
3. How long has he been like this
4. Has he seen a doctor
No, he doesn’t.
Two days.
He looks weak.
He has a headache and a cough.
= He has got a pain in his head.
/He has been like this for two days.
No, he hasn’t.
/ Not yet.
pain
n. 疼，痛，痛苦
Kangkang was going to leave the West Hill.
He met He met Mrs. Zhou.
Mrs. Zhou.
They had a talk.
Kangkang asked Mrs. Zhou some questions.
…
…
What questions did Kangkang ask
They had a talk.
Kangkang asked Mrs. Zhou some questions.
What questions did Kangkang ask
1c Read 1a and answer the questions.
1. What caused Mrs. Zhou’s problems
2. What will Kangkang do
3. Do you have any other ways to solve
Mrs. Zhou’s problems
The bad air and too much noise.
He will write to the newspaper about
these problems.
There are many kinds of pollution around us,
air pollution
light pollution
litter
water pollution
soil pollution
noise pollution
including
noise pollution
Noise is a sort/kind of pollution.
There are all sorts/kinds of noises.
They make us uncomfortable and unpleasant.
n. 种类；
v. 把……分类
adj. 使人不舒服的
adj. 令人不快的
noises made by
Let’s write down the things that can make noises.
piano
bus
cat
wind
Underline the topic sentence of the passage
in 1a.
Give a proper title to this passage.
Try to find out the topic sentence to understand the content of a paragraph.
Read 1a and complete the following tasks.
Task 1
Noise is also a kind of pollution and is harmful to human’s health.
Noise Pollution
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.
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
Task 4
1b Read 1a and match the words with their meanings.
a. Not all people know noise is also a kind of
pollution.
_____ ________ know(s) noise is a kind of
pollution ____ ______.
b. 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.
Task 5
Change the following sentences into the ones that have the same meanings.
Not everyone
/some people
as well
as
weak as
WHY
Because they always listen to loud pop music.
It _____ (be) beautiful in the past. Kangkang _______ (go) there two years ago.
The flowers and grass ___________ (go).
Everything _____________ (change).
Mrs. Zhou ____________ (be) like this since last week.
She ______________ (not see) a doctor yet.
was
went
have gone
has changed
has been
hasn’t seen
Simple past 强调过去
Present perfect 强调现在
They are caused
by pollution.
Read through Sections A-C and fill in the blanks with the correct words.
Grammar
I _____ (go) there two years ago.
There ______ (be) lots of flowers and grass.
What _________________ (happen) here
I have ______ (be) like this since last week.
The flowers and grass ____________ (go)!
been
were
has happened
have gone
went
Simple Past ＆Present Perfect
Oh, what a _______!
There are several chemical factories _______ waste water into the stream.
What’s ______, the factory makes too much noise…
Noise is _________ to human’s health.
People who work and live in noisy conditions often ______ deaf.
…many teenagers in America can hear no ______ than 65-year-old people do, …
…does great _______ to people’s hearing.
Functions
worse
go
harmful
better
harm
shame
pouring
( ) 1. What is the passage mainly about
A. Air pollution. B. Light pollution.
C. Litter. D. All sorts of pollution.
( ) 2. ________ destroy(s) the soil.
A. Chemicals B. Weather
C. Noise D. Industry
( ) 3. How do people feel after they work in strong light for
a long time
A. Excited. B. Happy.
C. Terrible. D. Sad.
How well do you know Sections A-C Now do the following tasks and check.
A
D
C
Read 1a and choose the best answer.
Pollution Cause Effect
air pollution burning_____, _____ and _____ _____ eyes and _________ problems
soil pollution _____ is everywhere, use too many __________ ______ environment and _________ food
noise pollution _______________ place for a long time make people _____ and cause ____________ pressure
light pollution _______ light kinds of ________, bad for ________
1a Read the passage and complete the table on Page 34.
gas
oil
coal
sore
breathing
litter
chemicals
dirty
unhealthy
work in a noisy
deaf
high blood
strong
illnesses
eyes
1. They are bad for our health in many ways.
They ____________to our health in different ways.
2. People may lose their hearing if they work in a noisy
place for a long time.
If people work in noisy conditions for a long time they
may have ______________.
3. Noise pollution can make people deaf.
People may ______ deaf _____________ noise pollution.
1b Read and understand the first sentence. Then complete the second one.
hearing loss
do harm
go
because of
/ are harmful
There are many __________ of pollution around us. They are ______ for our health in many ways.
Air pollution causes _____ eyes and __________ problems. ______ makes our environment dirty. Soil pollution ________ the soil and _______ unhealthy food. Noise pollution makes people ______ and causes high blood pressure. Light pollution is bad for _____ and causes some kinds of __________.
With less pollution, our planet will become _______ and our health will be better. Let’s be greener people.
Complete the passage according to 1a.
kinds/sorts
bad
sore
breathing
Litter
destroys
causes
deaf
eyes
illnesses
greener
1.Look, there are several chemical factories pouring waste water into the stream.
“看， 有几家化工厂正在向河里排放废水。”(1)There be＋sb./sth.＋doing sth. “有某人/某物正在做某事”
Let's review the points
There are many people giving (give) hands without telling their names. “有很多人帮忙不留名。” (改编自2020·贵州遵义)(2)pour sth.into sp. “把某物倒入某地方”The super rich Richard Branson, Jeff Bezos and Elon Musk are all
business space flying machines. “超级富豪理查德·布兰森、杰夫·贝佐斯和埃隆·马斯克都在投入巨资开发商业太空飞行器。” (改编自2021·浙江绍兴)
giving
pouring
money
into
developing
(3)waste的用法：wasteadj.“废弃的， 无用的”(v.“浪费”)①When looking at a pair of old chopsticks, most people would see nothing . “当看到一双旧筷子，大多数人只会把它当作垃圾。” (改编自2021·山西)
but
waste
②It’s nearly one third of the in the world.
“这将近是世界上食物浪费的三分之一。” (改编自2021·湖南岳阳)③There is a new rule to make sure that you don’t .
“有一条新规定， 确保你不浪费食物。” (改编自2021·四川乐山)④Plastic bags do not turn into soil as easily as other . “塑料袋不像其他废料那么容易转化成土壤。”
food
waste
waste
food
waste
materials
2.I’m always in a bad mood because I can’t bear the environment here.
“我一直心情不好， 因为我无法容忍这儿的环境。”bear “容忍， 忍受”
后接名词、 代词及动名词作宾语。
can’t bear (doing) sth. “无法容忍(做)某事”
I _________________ so late.
“我无法忍受熬夜到这么迟。”I don’t feel very well. I can’t bear this weather .
“我感到不太舒服。我受不了这天气。”
can’t
bear
staying
up
3.However,not all people know noise is also a kind of pollution and is harmful to human's health.
然而,并非所有人都知道噪音亦是一种污染是一个对人体有害的健康。
not all....表示部分否定，译为不是所有的都.....。not 与both, all,every以及every 的派生词连用时表示部分否定。
e.g.Not everyboby likes watching TV.
并非每个人都喜欢看电视的。
neither ,none ,nothing,nobody,no one
等表示全部否定。
e.g.
Neither of the students like running.
两个学生都不喜欢跑步。
I think nothing is difficult for me .
我觉得对我来说没什么难的。
拓展
(2)
【辨析】pollute和pollution
For example, because of overfishing and water _______ ， the river’s Chinese paddlefish(中国白鲟) has died out there. (改编自2021·湖北荆州)Some rubbish will pollute the groundwater. (改编自2021·四川德阳)
pollution
4.Recently, it is reported that many teenagers in America can hear no better than 65－year－old people do.
“据报道， 近年来美国很多青少年的听力几乎与65岁的老人一样差。”(1)It is reported that＋句子 “据报道”类似句型： It is said that＋句子 “据说”
no better than 意为同 （几乎）一样；和 （几乎）一样坏。
It is said that fans were first used to cool the air during the Shang Dynasty.
“据说，扇子最早是在商朝时用来冷却空气的。” (2020·四川凉山)(2)no better than …＝as weak/bad(ly) as … “几乎和……一样差/坏”The train’s average speed was no better than that of our bicycles.
“这趟火车的平均速度比我们骑自行车的速度快不了多少。”
Not better than与no better than的区别：
1.“not +比较级+than ” “不比…好（或坏）”，即两者在某方面不相上下。
eg：John is not better than Tom. 约翰并不比汤姆好。
He is not healthier than his friend. 他并不比他的朋友更健康。
2.“no+比较级+than ”结构表示该形容词或副词的相反含义，意思是“与…一样不…”
如：no better than意义上相当于as bad as,
eg：In those days, the labouring people lived no better than beasts of burden.
在那些日子里，劳动人民过着牛马般(牛马不如)的生活。
拓展：
5.Many countries are trying to solve all sorts of environmental problems, including noise pollution.
“很多国家都在尽力解决各种环境问题，包括噪声污染。”(1)try to do sth. “尽力做某事”； try doing sth. “尝试做某事” (2)including prep. “包括，包含”；include v. “包含”Wolong is a large nature reserve, which includes several panda bases for breeding and research.
“卧龙是一个大型自然保护区， 包括几个大熊猫繁殖和研究基地。” (改编自2021·四川成都)
6.It not only disturbs others but also does great harm to people’s hearing. 。”
Smoking does harm to your health.＝ Smoking is harmful to your health.
。”Your mean rumors have spread and harmed the good reputation of your neighbor.
“2021·四川乐山)
7.Too much noise can cause high blood pressure as well. “太多的噪声还可能引发高血压。”(1)too much意为 “太多的”， 其后加不可数名词。如： too much water “太多水”much too意为“太，非常”，后加形容词或副词。如： much too cold “太冷”
拓展
too many + 可数名词复数
e.g. There are too many people in the supermarket. I don’t want to go there any more.
：
1).much + 不可数名词
e.g. I am busy. I have too much work to do.
2).much too + adj./ adv.
It’s much too cold today. Many people stay at home instead of going out.
(2)as well是副词短语，意为“也”，相当于too,一般放在句末，有n词ad或but 搭配。Do some leg exercises every week as well, because this makes you stronger and helps you run better. “每周也做一些腿部运动，因为这会让你强壮，帮助你跑得更好。” (2021·四川乐山)
8. Too much noise can cause high blood pressure as well.噪声太大也可能导致高血压。
high blood pressure 高血压
as well 也, 还
e.g. We’re going to the party tonight.
Why don’t you come along as well
拓展：also，too，as well与either 的区别
also，as well，too，用于肯定句，
also常用于be动词，情态动词，助动词之后，行为动词之前；
as well，too用于句末；
either用于否定句中，置于句末。
9.It’s difficult for me to breathe. 我呼吸很困难。
拓展：breathe v. 呼吸
e.g. He could hardly breathe because of the
lung cancer.
breath n . 呼吸
eeee.ge. She took a long slow breath to calm down.
It’s + adj. + for sb. to do sth.
e.g. It’s important for us to learn English well.
It’s easy for him to solve this problem.
somebody, someone, something, somewhere
anybody, anyone, anything, anywhere
none, nobody, nothing, nowhere
everybody, everyone, everything, everywhere
一般情况下用于肯定句
一般情况下用于否定句和疑问句
表否定含义
可用于各种句式
10.不定代词和副词
1).I have ____ to tell you.
A. important something
B. something important
B
解析：形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后
典例
2).Everybody ___ ready for the match.
A. is B. are C be
解析：不定代词作主语时，谓语动词要用单数。
A
典例
11.A:---How long have you been like this
B:----I've been like this since last week.
扩展：how long意为多久，多长时间，用来询问或谈论某段时间，答语通常用for,since等引导的时间状语，谓语动词必须为延续性动词。如：
——How long have you learned English
------I have learned English for three years.
12 .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
e.g. Beethoven was deaf.
go deaf 变聋
e.g. He _____ _____ because of the traffic accident.
went deaf
拓展：deaf adj. 聋的
13…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
e.g. Look! The man is printing something.
lose one’s hearing 丧失听力
a printer
hearing n. 听力，听觉
拓展：print v. 印刷
14. Burning gas, oil, coal creates air pollution.
燃烧气体、石油和煤都会造成空气污染。
拓展： create v. 造成，创造
creative adj. 创造性的
creation n. 创造；创造物
In the fields, farmers use too many
chemicals which destroy the soil.
在地里，农民使用了太多对土壤起破坏作用的化肥和农药。
定语从句
15. With the increase in population and the development of industry, litter is everywhere.
随着人口的增加和工业的发展，垃圾到处都是。
拓展：With less pollution, our planet will become
greener and our health will be better.
随着污染的减少，我们的地球将变得更加环
保，我们也会更健康。
16.What has been done to solve these problems
为解决这些问题做了哪些工作？
has been done 是现在完成时的被动语态。
语法一：一般过去时与现在完成时的辨析
【要点】　一般过去时表示过去某时发生的动作或单纯叙述过去的事情,强调过去的动作与现在没有联系,只是说明某个动作发生的时间是在过去;现在完成时为过去发生的,强调过去的事情对现在的影响。一般过去时的谓语动词用过去式,而现在完成时的谓语基本构成是“have/has+动词的过去分词”。如:
I have visited a museum.(说明现在对博物馆有所了解)
I visited a museum last week.(只说明上周参观博物馆这个动作)
Let's go over the grammar
【 1】一般过去时通常与表示过去的时间状语如yesterday,last week,ago,just now,in 2009 等连用;而现在完成时则常与just,already,ever,never 等副词或since,for等表示一段时间的状语连用。如: He has lived in Beijing for 10 years.
He lived in Beijing for 10 years.
【 2】现在完成时表示的动作或状态延续到现在并可能延续下去,而一般过去时则单纯表示过去某段时间内的经历。如:
I have reviewed two lessons this morning.
I reviewed two lessons this morning.
语法二：五种时态的被动语态及带有情态动词的被动语态。
(1) 一般现在时被动语态的构成：助动词be + 动词的过去分词
English is spoken in many countries.
(2) 一般过去时被动语态的构成：助动词was/were + 动词的过去分词
Was this novel written by his father
(3) 一般将来时被动语态的构成：will/be going to do + be + 动词的过去分词
The baby will be taken good care of in the hospital.
(4) 现在完成时被动语态的构成：助动词have/has + been + 动词的过去分词
Has his work been finished
(5) 现在进行时被动语态的构成：be + being + 动词的过去分词
The problem is being discussed by the students.
(6)带有情态动词的被动语态的 构成：情态动词 + be + 动词的过去分词
Your composition must be handed in tomorrow.
1.（2022·湖北武汉·中考真题）—Congratulations! You ________ big progress in the last three years.
—Thank you, Mr. Li. I’ll never forget the good times in Junior High.
A．make B．made C．have made D．will make
【答案】C
【解析】句意：——祝贺你！你在过去的三年里取得了很大的进步。——谢谢你，李先生。我永远不会忘记初中的美好时光。
考查动词时态。根据时间状语“in the last three years”可知，本句时态是现在完成时(have/has done)。故选C。
Let's practice
【中考链接】
2.（2022·湖南怀化·中考真题）We _______ each other since I came to Changsha, but we often send emails.
A．haven’t seen B．didn’t see C．don’t see
【答案】A
【解析】句意：自从我来到长沙我们就没见过面，但我们经常发邮件。
考查现在完成时。根据“since I came to Changsha”可知，句子时态为现在完成时，其构成为：have/has+动词的过去分词，故选A。
3.（2022·江苏扬州·中考真题）—May I speak to Wang Li
—Sorry, she is not at home. She ________ since last month.
A．left B．has left C．has been away D．went away
【答案】C
【解析】句意：——我可以和王丽说话吗？——对不起，她不在家。从上个月开始，她就离开了。
考查时态。根据“since last month”可知句子应使用现在完成时have/has done，排除AD；且此处应用延续性动词，而left“离开”是非延续动词，排除B。故选C。
4．（2022·四川达州·中考真题）— Bruce ________ so much in the past two years.
— Yeah, he ________ be shy, but now he is confident and active.
A．has changed; used to B．changed; is used to
C．changed; used to D．has changed; is used to
【答案】A
【解析】句意：——布鲁斯在过去的两年中变化很大。——是的，他以前很害羞，但现在他很自信和积极。
考查时态。第一处根据“in the past two years”可知，用现在完成时，排除BC；第二处根据“but now he is confident and active”可知，强调与现在的对比，用used to be结构，是一般过去时。be used to do sth“被用来做某事”，不符合语境。故选A。
5．（2022·四川遂宁·中考真题）—You dance so well, Alice.
—Thanks. I ________ Chinese dance since I was 5 years old.
A．learn B．learnt C．am learning D．have learnt
【答案】D
【解析】句意：——Alice，你跳舞跳得真好。——谢谢。我从5岁开始学习中国舞。
考查时态。根据“since I was 5 years old”可知句子使用现在完成时have/has done。故选D。
6．（2022·河北·中考真题）Sorry, I ________ a mistake. Let me correct it.
A．will make B．am making C．was making D．have made
【答案】D
【解析】句意：对不起，我弄错了。我来纠正一下。
考查现在完成时。根据“Sorry, I...a mistake. Let me correct it.”可知，因为已经犯了错误，所以现在要去纠正，故选D。
7．（2022·湖北十堰·中考真题）Since he was a little boy, he ________ in love with music.
A．is B．was C．has been D．had been
【答案】C
【解析】句意：他从小就爱上了音乐。
考查现在完成时。根据“Since he was a little boy, he...in love with music.”可知，此处是“since+一般过去时，现在完成时”结构，故选C。
8.（2020年湖北省宜昌）—How about the third season of documentary Aerial China（航拍中国）
—Great. I____________ it twice.
A. watched B. watch C. will watch D. have watched
【答案】D
【解析】句意：——纪录片《航拍中国》第三季怎么样？——太好了。我已经看了两遍了。watched观看，过去式；watch观看，动词原形；will watch观看，一般将来时；have watched观看，现在完成时；根据句意理解及空格后的twice可知，这里表达的是“已经看过两遍了”，所以应用现在完成时，故选D。
考查时态。
看图写话。
1. pour, waste 　
The factory is pouring waste water into the river.　
2. pain 　
He felt a pain in his chest./The boy has (got) a pain in his chest.　
情景交际。1. 你想邀请朋友这周末和你一起去放风筝, 可以这样说: How about 　flying kites/a kite with me this weekend　　 2. 你去看病, 医生想知道你这样多久了, 他会这样问:　How long have you been like this　　 3. 弟弟经常听大声的音乐, 你可以这样劝他:Don’t 　listen to loud music　　.
4. 你最近心情不好, 可以这样向朋友倾诉:　I’m in a bad mood　　 these days. 5. 你想告诉朋友这条河以前很干净, 可以这样说:　The river used to be very clean./The river was very clean in the past.　　.
Ⅰ.用pollute,pollution 的适当形式填空。
1.The men were clearing all the 　　　 off the beach.
2.The river has been 　　　 by waste products from the factory.
【答案】　1.pollution　2.polluted
【解析】　pollute动词,意为“污染,弄脏”;pollution 名词,意为“污染,污染物”。
词汇纵横
Ⅱ.用pain,ache 的适当形式填空。
1.I have 　　　 all over.
2.I have a(n) 　　　 in my leg.
【答案】　1.pains　2.ache/pain
【解析】　pain “疼,痛苦”,常指身体或精神的痛苦;ache “痛”,指(人)身体的疼痛,往往用于持续的疼痛,或因一些小病引起的感觉,常是局部的;ache也可和表示痛的部位名词组合形成新词,如headache,stomachache,而pain不行。
Ⅲ.用bear的适当形式填空。
1.All the 　　　 can be dangerous.
2.Her mother 　　　 four children.
3.I can 　　　 the old man.
4his daughter in 2004
【答案】　1.bears　2.bore　3.bear 4was born
【解析】　bear 作名词,意为“熊”; bear 作动词,意为“承受,忍受”,与stand 同义,be born 出生。
Ⅳ.用 harm,hurt,wound 的适当形式填空。
1.My feelings were 　　　 when he didn’t ask me to the party.
2.Did the storm do any 　　　 to the crops
3.He had a knife 　　　 in the arm.
【答案】　1.hurt　2.harm　3.wound
【解析】　harm指对人或事物造成危害,这种危害不一定是直接的,也不一定有痛楚;harm用于肉体或精神上的伤害均可,有时可指引起不安或不便,还可用于抽象事物,尤其是指不道德的事情。hurt常指精神上、肉体上或感情上的伤害,含有强烈的疼痛。wound通常指外界暴力造成创伤,多指刀枪伤害。
如何保护环境已经成为世界上最大的难题之一。请根据提示词，围绕地球上的各种污染造成的影响，并提出保护环境的倡议，写一篇80词左右的短文。
提示词： problem，kinds of pollution， such as, harm, pour, protect
Let's write a composition
参考答案：
How to protect our environment has become one of the biggest
problems.
There are miny kinds of pollution around us.
再分析污染对我们环境和健康都有害。
一句话作为第一段。
Such as, rubbish, air pollution and water pollution.
接着罗列几种具体的污染。
They do great harm to our environment and our health.
先写出第二段的中心句。
For example, there are some factories pouring waste water into the rivers.
As a result, the water is dirty and many kinds of fish are dead.
强调地球的重要性。
具体详解其中的一个污染现象。
It is everyone's duty to protcet our environment,
It's one's duty to do sth:做某事是某人的责任。(写到倡议)
because we only have one home, earth.
写水污染造成的影响。