导入 单词 阅读 复述 作业 欣赏

南海信息技术学校

赵月

娇

Water pollution

Air pollution

Soil pollution

New 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.

T

T

T

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.

F

F

F

Retell the passage:(use the pictures and the sentences to help)

The area of desert is growing.

Retell the passage:

Too many sheep and cattle

All the grass be eaten

Grass never grow again; the land become desert

Retell the passage:

trees be cut downnothing to hold…

soil be washed into…

soil be blown away

Retell the passage:

travel ; fall to the ground in the rain

Chemicals in smoke cause a lot of damage.

Retell the passage:

trees be destroyed fish be killed

Retell the passage:

smoke from factories , power stations and cars

Retell the passage:

I.

II.

Time :

Place :

Results :

Time :

Place :

Results :

1986at a nuclear powerstation in Russia

125,000 die

1984at a factory in the town of Bhopalin India

2500 be killed;many lose sightaccidents

waste from factories and cities

1989

35,000

34,000

10,000

4,800

a sinking oil tanker

1.Copy the new words.

2.Finish workbook exercise 2 and 3.