This is ＿＿ secret information so don't breathe ＿＿ word about it to anyone.A.X , aB.an ,aC.X , XD.some , any 题目和参考答案——青夏教育精英家教网—

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 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 sun make the earth even drier． Plants do not let the wind blow the dirt away． When a bit of rain falls， the plants hold the water． Without plants， the land can become desert more easily．
【小题1】Deserts ＿＿＿＿＿＿＿＿．

A．Earthquakes make deserts.	B．Wind makes deserts.
C． Lack of water makes deserts.	D．People make 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．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 sun make the earth even drier． Plants do not let the wind blow the dirt away． When a bit of rain falls， the plants hold the water． Without plants， the land can become desert more easily．
【小题1】Deserts ＿＿＿＿＿＿＿＿．

A．never have any plants or animals in them

B．can all be turned into good land before long

C．are becoming smaller and smaller

D．get very little rain

【小题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 soil away

C．they hold water

D．All of the above．

【小题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

【小题4】Why is more and more land becoming desert according to this passage？

A．Earthquakes make deserts.	B．Wind makes deserts.
C． Lack of water makes deserts.	D．People make 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．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 sun make the earth even drier． Plants do not let the wind blow the dirt away． When a bit of rain falls， the plants hold the water． Without plants， the land can become desert more easily．

1.Deserts ＿＿＿＿＿＿＿＿．

A．never have any plants or animals in them

B．can all be turned into good land before long

C．are becoming smaller and smaller

D．get very little rain

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 soil 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.Why is more and more land becoming desert according to this passage？

A．Earthquakes make deserts. B．Wind makes deserts.

C． Lack of water makes deserts. D．People make 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． 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 sun make the earth even drier． Plants do not let the wind blow the dirt away． When a bit of rain falls， the plants hold the water． Without plants， the land can become desert more easily．

1. Deserts ＿＿＿＿＿＿＿＿．

A． never have any plants or animals in them

B． can all be turned into good land before long

C． are becoming smaller and smaller D． get very little rain

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 soil 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．

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 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 sun make the earth even drier. Plants do not let the wind blow the dirt away. When a bit of rain falls, the plants hold the water. Without plants, the land can become desert more easily.

41. Deserts ＿＿＿＿＿＿＿＿ .

A. never have any plants or animals in them

B. can all be turned into good land before long

C. are becoming smaller and smaller

D. get very little rain

42. 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 soil away

C. they hold water

D. All of the above.

43. 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

44. After reading this passage, 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 cut them

This is ＿＿ secret information so don't breathe ＿＿ word about it to anyone.

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