Question

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.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

 

Answer 1

【答案】

1.D

2.D

3.C

4.A

【解析】

试题分析：

1.推理题：从第一句话：They want to bring water to the deserts， so people can live and grow food. 可知沙漠的水很少。选D

2.排除题;文章第三段提到ABC没有提到D。

3.推理题：从文章第二段看出，科学家认为是人导致沙漠的。可知C正确

4.推理题：从最后一句话：Without plants，the land can become desert more easily. 可知植物可以阻止土地变成沙漠。选A

考点; 考查环保类短文

点评：本文讲述的是树木对土壤的重要性。呼吁人们多种树，保护树木，防止土地沙漠化。文章内容比较简单，只需要读懂文章的即可，以细节题为主。