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Deserts(沙漠)do not stay the same size (形狀).Sometimes they grow bigger. Sometimes they get smaller. The world’s biggest desert, Sahara, is in Africa. Right now, the Sahara desert is growing fast.
Why is the Sahara growing ? In some places , People farm too much.  In other places ,animals eat all the grass. or people cut down the trees. This makes the soil(土壤) weak. Weak soil lets the desert grow.
Why is it a problem? people can not grow food in the desert. people can not build houses, hospitals , or schools in the desert . so people must leave their homes .They must live somewhere else.
What can people do ? They can plant trees. They can also farm less. These things make soil stronger. maybe the Sahara will stop growing . It’s a big problem. Many people must work together to solve (解決) it?
【小題1】What is the main idea ?(中心思想)

A．The Sahara Desert is in Africa .
B．Farming too much makes the soil weak.
C．Big problem are caused (引起) by the growing Sahara desert.
D．Planting trees will help the world.
【小題2】The Sahara is growing .Which of these things is not a reason(理由)？
A．Building homesB．Farming too much
C．Animals eating the grassD．Cutting down trees
【小題3】What do we know about deserts ?
A．Their size never changesB．They are caused by people
C．They can make trouble for peopleD．They are all in Africa.
【小題4】Planting trees can   
A．make the soil weakerB．help people farm less
C．be good for the soilD．make the Sahara grow.
【小題5】Stopping growing the desert
A．is easyB．takes a lot of people
C．is not a big problemD．is not important


【小題1】D
【小題2】A
【小題3】C
【小題4】C
【小題5】B    

解析【小題1】根據(jù)文章內容大意可知答案為D
【小題2】根據(jù)文章內容Why is the Sahara growing ? In some places, People farm too much.  In other places, animals eat all the grass. or people cut down the trees. This makes the soil(土壤) weak. Weak soil lets the desert grow.可知答案為A
【小題3】根據(jù)文章內容. so people must leave their homes .They must live somewhere else.可知答案為C
【小題4】根據(jù)文章內容What can people do ? They can plant trees. They can also farm less. These things make soil stronger.可知答案為C
【小題5】根據(jù)文章內容It’s a big problem. Many people must work together to solve (解決) it?可知答案為B

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閱讀理解

　　Scientists are trying to make the deserts(沙漠)into good land again．They want to bring water to the deserts, so people can live and grow food．They are learning a lot about the deserts．But more and more of the earth is becoming desert all the time．Scientists may not be able to change the desert in time．

　　Why is more and more land becoming desert? Scientists think that people make deserts．People are doing bad things to the earth．

　　Some places on the earth don’t get much rain．But they still don’t become deserts．This is because some green plants are growing there．Small green plants and grass are very important to dry places．Plants don’t let the hot sun make the earth even drier．Plants don’t let the wind blow the earth away．When a little bit of rain falls, the plants hold the water．Without plants, the land can become a desert much more easily．

(1)

Deserts________．

[　　]

A．

get very little rain

B．

never have any plants or animals in them

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can all be turned into good land in the future

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both A and C

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Small green plants are very important to dry places because________．

[　　]

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[　　]

A．

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[　　]

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More and more places are becoming deserts all the time．

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After reading this, we learn that ________．

[　　]

A．

plant can keep dry land from becoming desert．

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　　Almost everyone in the world uses oil(石油)in some way．Without oil, the world will stop, so men look for it everywhere．In our film today, you can see some oilmen．They are drilling for oil．They drill for oil in deserts(沙漠), in mountains and under the sea．Quite often they find nothing, but the search for oil continues．Oil is very important because none of our machines can work without it．Big ships carry oil everywhere．Perhaps the oil in your bicycle or in your father's car has come from somewhere far away．Perhaps it has come from Texas, Iraq, or Venezuela．Cars and bicycles need oil, but so do many other things．How many things can you name?

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Deserts(沙漠)do not stay the same size (形狀).Sometimes they grow bigger. Sometimes they get smaller. The world’s biggest desert, Sahara, is in Africa. Right now, the Sahara desert is growing fast.

Why is the Sahara growing ? In some places , People farm too much.  In other places ,animals eat all the grass. or people cut down the trees. This makes the soil(土壤) weak. Weak soil lets the desert grow.

Why is it a problem? people can not grow food in the desert. people can not build houses, hospitals , or schools in the desert . so people must leave their homes .They must live somewhere else.

What can people do ? They can plant trees. They can also farm less. These things make soil stronger. maybe the Sahara will stop growing . It’s a big problem. Many people must work together to solve (解決) it?

1.What is the main idea ?(中心思想)

A．The Sahara Desert is in Africa .

B．Farming too much makes the soil weak.

C．Big problem are caused (引起) by the growing Sahara desert.

D．Planting trees will help the world.

2.The Sahara is growing .Which of these things is not a reason(理由)？

A．Building homes

B．Farming too much

C．Animals eating the grass

D．Cutting down trees

3.What do we know about deserts ?

A．Their size never changes

B．They are caused by people

C．They can make trouble for people

D．They are all in Africa.

4.Planting trees can   

A．make the soil weaker

B．help people farm less

C．be good for the soil

D．make the Sahara grow.

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A．is easy

B．takes a lot of people

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D．is not important

 

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