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Forests have always been important to people. We make use of them in many   46  . First, trees   47   man fruits and building materials in the form of wood. Without trees it would be   __48   to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds are made of   49  . Second, trees can  50   man from terrible heat. They provide shade for us. Third, they are also useful in stopping rich top soil from being washed away by heavy rains. The top soil is   51   for plants.

Unfortunately, because people in the past did not know enough about the science of nature, they   52    down too many trees and never planted new ones. Gradually the   53   of trees became smaller and smaller. And the rich surface soil was blown and washed away by strong wind and heavy rain. In the end the rich lands    54   into useless deserts.   55__  could grow there any more.

(   )46. A. ideas                B. ways                 C. parts               D. countries

(   )47. A. give                 B. show                C. make              D. bring

(   )48. A. different             B. impossible      C. interesting         D. easy

(   )49. A. plastic                      B. glass                 C. rubber             D. wood

(   )50. A. separate             B. stop            C. protect         D. save

(   )51. A. bad                  B. dangerous       C. important        D. special

(   )52. A. wrote               B. cut                    C. broke              D. pulled

(   )53. A. number                     B. height           C. weight            D. quality

(   )54. A. flowed               B. ran                    C. changed            D. fell

(   )55. A. Everything          B. Something     C. Anything           D. Nothing

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In 1620,about half the USA was covered by forests .Today the forests have almost gone .A lot of good land has gone with them ,leaving only sand .China doesn’t want to copy the USA’s example.We’re planting more and more tress .We’ve built the “Great Green Wall ”of tress across northern pat of our country .The “Great Green Wall”is 7,000 kilometers long ,and between 400 and 1,700 kilometers wide .It will stop the wind from blowing the earth away .It will stop the sand from moving towards the rich farmland in the south .More “Great Green Wall ”are needed .Trees must be grown all over the world. “Great Green Wall ”will make the world better .
根据短文内容,选择正确答案。
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A.a thirdB.halfC.to thirdsD.a fourth
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C.7,000 metersD.400 kilometers
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根据短文内容,选择正确答案。

1.In 1620 ,about_____ the USA was covered by forests

A.a third

B.half

C.to thirds

D.a fourth

2. A lot of good land has gone with _____.

A.sand

B.water

C.wind

D.forests

3. The “Great Green Wall”In China is _____long

A.7,000 kilometers

B.1,700 kilometers

C.7,000 meters

D.400 kilometers

4. Trees must be grown in _____.

A.China

B.the USA

C.some countries

D.every part of the world

5._____ will make the world better .

A.the Great Wall

B.Tall buildings

C.Great Green Wall

D.Flowers and glass

 

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In 1620, about half the U.S.A. was covered by forests. Today the forests have almost gone. A lot of good land has gone with them, leaving only sand. China doesn’t want to copy the U.S.A.’s example. We’re planting more and more trees. We’ve built the “Great Green Wall” of trees across northern part of our country. The Great Green Wall is 7,000 kilometers long, and between 400 and 1,700 kilometers wide. It will stop the wind from blowing the earth away. It will stop the sand from moving towards the rich farmland in the south. More “Great Green Walls” are needed. Trees must be grown all over the world. Great Green Walls will make the world better.

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A.a third

B.half

C.two thirds

D.a fourth

2. A lot of good land has gone with ______.

A.sand

B.water

C.wind

D.forests

3. The Great Green Wall in China is ______ long.

A.7,000 kilometers

B.1,700 kilometers

C.7,000 meters

D.400 kilometers

4. Trees must be grown in ______.

A.China

B.the USA

C.some countries

D.every part of the world

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A.The Great Wall

B.Tall buildings

C.Great Green Walls

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         Forests have always been useful and important to men who make use of them in many ways. Every day trees are serving man everywhere. Trees supply man with fruits and building materials in the form of wood. Without trees it would be impossible to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds is made of wood. Trees can stop man from the terrible heat. They’re also useful in preventing(阻止) good and rich top soil from being washed away during heavy rains. If there were no forests, heavy rains would wash away the rich surface(表层) soil that is so important to plants. The result is that the land will become a desert. There are plenty of desert areas in the world. A long time ago these desert areas used to be very rich areas, but men in the past had no enough knowledge about science of nature, and they cut down too many trees in the area where they lived and never planted new ones. By and by, the rich surface soil was blown and washed away by strong winds and heavy rains. In the end the rich land changed into useless deserts where nothing could grow.

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1.Trees are not serving man everywhere.

2.Without trees it would be possible to build houses, boats, bridges and so on.

3.Trees can stop man from the terrible heat.

4.There are few desert areas in the world.

5.In the end the rich land changed into useless deserts where nothing could grow.

 

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