Desertsdo not stay the same size .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 Sa 题目和参考答案——青夏教育精英家教网—

题目内容

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.

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 (解决) 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.

5.Stopping growing the desert

A．is easy	B．takes a lot of people
C．is not a big problem	D．is not important

【答案】

1.D

2.A

3.C

4.C

5.B

【解析】

1.根据文章内容大意可知答案为D

2.根据文章内容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.可知答案为A

3.根据文章内容. so people must leave their homes .They must live somewhere else.可知答案为C

4.根据文章内容What can people do ? They can plant trees. They can also farm less. These things make soil stronger.可知答案为C

5.根据文章内容It’s a big problem. Many people must work together to solve (解决) it?可知答案为B

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相关题目

阅读理解

　　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
C．	can all be turned into good land in the future
D．	both A and C

(2)

Small green plants are very important to dry places because________．
[　　]
A．	they don’t let the sun make the earth even drier
B．	they don’t let the wind blow the earth away
C．	they hold the water
D．	A, B and C

(3)

Land is becoming desert little by little because ________．
[　　]
A．	plants can’t grow there
B．	there’s not enough rain
C．	people are doing bad things to the earth．
D．	scientists know little about desert

(4)

Which is the main idea of the first paragraph(段)?
[　　]
A．	Scientists know how to change land into good land．
B．	Land is becoming desert faster than scientists can change it back into good land．
C．	If scientists can bring water to the desert, people can live there．
D．	More and more places are becoming deserts all the time．

(5)

After reading this, we learn that ________．
[　　]
A．	plant can keep dry land from becoming desert．
B．	it is good to get rid of(清除)the grass in the desert
C．	all places without much rain will become deserts
D．	it is better to grow crops on dry land than to grow grass

阅读理解

　　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?

(1)

________ oil in some way in the world．
[　　]
A．	Most people use
B．	People seldom uses
C．	All people use
D．	Few people use

(2)

In the passage “drill” means ________．
[　　]
A．	操练
B．	训练
C．	钻探
D．	开采

(3)

Oilmen sometimes find oil ________．
[　　]
A．	in deserts
B．	in mountains
C．	under the sea
D．	A,B and C

(4)

Oilmen ________ oil all the time．
[　　]
A．	look up
B．	look for
C．	look into
D．	look out

(5)

The sentence “Big ship carry oil everywhere．” tells us ________．
[　　]
A．	oil comes from everywhere
B．	oil comes from big ships
C．	oil is needed everywhere
D．	big ships need oil everywhere

People have more difficult time to live in some places on the earth. It is hard for people to live on the top of high mountains, to live in deserts(沙漠), in rain forests and the North Pole (北极). The Eskimos(爱斯基摩人) live near the North Pole.

In their world of ice and snow, they can't grow fruits and vegetables. There are two seasons near the North Pole. The winter is long, cold and dark. For more than two months, you can't see the sun. There are twenty-four hours of night every day. The summer days are long. For more than two months, the sun never goes away. There is no night at all.

The Eskimos live by fishing. They must fish and get enough food for themselves and their families. Dogs are very important in the lives of the Eskimos. Dogs help the Eskimos to get food and move about. The Eskimos must always take very good care of their dogs.

The Eskimos have a very hard life. They often feel the danger of being hungry. If a man is not good at fishing, he and his family may feel hungry more than other people do. If they don't want to get hungry often, they have to be good at fishing.

1． It is ________ for people to live near the North Pole. (　)

A．easy

B．nice

C．good

D．hard

2． There are ________ seasons near the North Pole. (　)

A．12

B．3

C．2

D．4

3． The Eskimos always eat ________. (　)

A．fruits

B．vegetables

C．fish

D．all kinds of animals

4． An Eskimo man should be good at ________. (　)

A．fishing

B．everything

C．speaking

D．working

5． Every Eskimo's family keeps ________. (　)

A．cats

B．dogs

C．cows

D．birds

Deserts(沙漠)do not stay the same size (形状).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 (解决) it?
【小题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.

【小题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

【小题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.

【小题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.

【小题5】Stopping growing the desert

A．is easy	B．takes a lot of people
C．is not a big problem	D．is not important

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