课件23张PPT。Unit 9 Saving the earthReading导入单词阅读复述作业欣赏What kind of pollution can you think of?What kind of pollution can you think of?Water pollutionAir pollutionSoil pollutionNew words:
Area: 地区
Cattle: 牛
Cause: 原因
Limit: 限制
Gradually:逐渐地
In place:
在适当的位置
Hillside:山腰
Blow away:刮走
Power: 动力
Mile: 英里
Chemical: 化学物
Time and time again:
多次
Sight: 视力
Lose one’s sight: 失明
Shore: 滨;岸
Present: 在场的
Dirty: 弄脏
Tanker: 油船
Pour: 倾泻
Square: 平方
Listen to the passage and answer
the following questions:
1. Why are trees very important?2. What is the cause of water pollution?Because trees can hold the soil in
place on the hillside.Waste from factories and cities is
the cause of water pollution.Get the students to read the passage
again and finish the following exercises:( )1. The passage points out that many parts
of the world with large populations and
plenty of crops have become deserts.
( )2. Land may become poor if farmers
do not limit the numbers of their cattle.
( )3. Good soil is gradually lost these
days as trees are being cut down.
( )4. Air pollution and water pollution are
the two causes of the problem that many
parts of the world have become deserts.
TTT F( )5. Chemicals in the smoke from power
stations can travel hundreds of miles
in the wind before falling down to the
ground in the rain. However, the rain
will not do any harm to man.
( )6. After a bad accident at a nuclear
power station, 50% of the trees in
Germany were damaged.
( )7. The examples of the accidents in
both India and Russia are used by the
writer to explain how water is polluted.
FFFRetell the passage:(use the pictures and the sentences to help)The area of desert is growing.Retell the passage:Too many sheep and cattleAll the grass be eatenGrass never grow again; the land become desertRetell the passage:trees be cut downnothing to hold…soil be washed into…soil be blown awayRetell the passage:travel ; fall to the ground
in the rainChemicals in smoke cause a lot of damage.Retell the passage:trees be destroyedfish be killedRetell the passage:smoke from factories , power stations and carsRetell the passage:I.II.Time :Place :Results :Time :Place :Results :1986at a nuclear power
station in Russia125,000 die1984at a factory in the
town of Bhopal
in India 2500 be killed;
many lose sightaccidentswaste from factories and cities198935,00034,00010,0004,800a sinking oil tanker1.Copy the new words.2.Finish workbook exercise 2 and 3.Homework退出The end