题目：
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．
答案：
小题1:D
小题2:D
小题3:C
小题4:D
题目分析：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。
小题1:细节题：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
小题2:细节题;文章第三段提到ABC，所以选D。
小题3:细节题：从文章第一段看出，是人们没有按照科学家所的做。可知C正确
小题4:细节题：从文章第二段Scientists think that people make deserts．科学家认为是人导致沙漠的。选D
考点; 考查环保类短文
点评：文章内容比较简单，只需要读懂文章的即可，以细节题为主。主要在于正确的审题，带着重要信息到文章里面到出处，答案往往就在这些句子中。
