摘要:10.They are learning a lecture.

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Scientists (科学家) 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 deserts all the time. Scientists may not be able to change the deserts. 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 helpful to dry (干旱的)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 deserts much more easily.

1.Why can the land become deserts?

A. Some places don’t get much rain.

B. Plants don’t let the hot sun make the earth even drier.

C. People don’t keep the earth well.

D. Scientists haven’t learnt enough about the deserts.

2.Scientists are???????? to make the deserts into good land again.

A. carrying water? B. growing food? C. doing nothing????????????? D. studying a lot

3.Which is NOT true?

A. The land never stops becoming deserts.

B. Scientists ask people to live in the deserts and grow food there.

C. People do bad things to the earth.

D. Scientists may not be able to change the deserts.

4.Why are green plants and grass helpful?

A. They can hold the water.?

B. They can keep the earth wet.

C. They can stop the wind from blowing the earth away.

D. All the above.

5.Which is the best title(题目)for the passage?

A. The Desert Problem?????????

B. People Make Deserts

C. Green Plants and Grass???????

D. The Deserts, the Tree and the Water

 

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任务型阅读。阅读短文,并根据短文内容回答问题。
  Why is more and more land becoming deserts?
  Scientists are trying to make the deserts into good land again. They want to
bring water to the deserts, so people can live and grow food there. They are
learning a lot about the deserts. But more and more of the earth are becoming
deserts all the time. Scientists may not be able to change the deserts in time.
  Scientists think that people make deserts. People are doing bad things to the
earth. (1)Some places on the earth do not get very much rain. But they still do
not become deserts. This is because some green plants are growing there. Small
green plants and grass are very important to dry places. Plants do not let the hot
sun make the earth even drier. Plants do not let the wind blow the soil away.
(2)When a little bit of rain falls, the plants hold the water. Without plants, the
land can become a desert much more easily.
根据短文内容,把划线部分译成汉语。
1.                                                                            
2.                                                                            
根据短文内容,回答下列问题。
3. Does the writer think scientists can turn the deserts into land? Why?
                                                                              
                                                                              
4. Why is more and more land becoming deserts while scientists are trying to
make the deserts into good land?
                                                                              
5. Why are small green plants and grass important to dry places?
                                                                              
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阅读理解。
    Scientists are trying to make the deserts 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 very 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 dirt away. When a little bit
of rain falls. The plants told 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 before long
D. both A and B
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 water
D. all of the above
3. Land is becoming desert little by little because           .
[     ]
A. plants can't grow there
B. there is not enough rain
C. people haven't done what scientists wish them to do
D. scientists know little about the deserts
4. Which is the main idea of the first paragraph?
[     ]
A. Scientists know how to change desert 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 desert, people can live and grow food there.
D. More and more places are becoming deserts all the time.
5. After reading this, we learn that           .
[     ]
A. plants can keep dry land from becoming desert
B. it is good to get rid of the grass in the deserts
C. all places without much rain will become deserts
D. it is better to grow crops on dry land than to grow grass
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阅读理解。
    Scientists (科学家) 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 very 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 (干的) places.
Plants don't let the hot sun make the earth even drier. Plants don't let the wind blow (吹) the dirt (土) away.
When a little 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 soon
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 hold water
C. they don't let the wind blow the earth away
D. all of the above
3. Land is becoming desert little by little (渐渐地) because ______.
[     ]
A. Plants can't grow there
B. There is not enough rain
C. People haven't done what scientists wish them to do
D. Scientists know little about the deserts
4. Which is the main idea of the first paragraph (段, 节)?
[     ]
A. Scientists know how to change desert 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 desert, people can live and grow food there.
D. More and more places are becoming deserts all the time.
5. After reading this, we learn that ______.
[     ]
A. plants can keep (阻止) dry land from becoming desert
B. it is good to get rid of (去除) the grass in the deserts
C. all places without much rain will become deserts
D. it is better to grow crops (农作物) on dry land than to grow grass
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