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．
小題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
小題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．
小題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
小題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．

小題1:D
小題2:D
小題3:C
小題4:D

試題分析：本文講述的是樹木對土壤的重要性。呼吁人們多種樹，保護樹木，防止土地沙漠化。
小題1:細節(jié)題：從第一句話：They want to bring water to the deserts， so people can live and grow food. 可知沙漠的水很少。選D
小題2:細節(jié)題;文章第三段提到ABC，所以選D。
小題3:細節(jié)題：從文章第一段看出，是人們沒有按照科學家所的做�？芍狢正確
小題4:細節(jié)題：從文章第二段Scientists think that people make deserts．科學家認為是人導致沙漠的。選D
考點; 考查環(huán)保類短文
點評：文章內容比較簡單，只需要讀懂文章的即可，以細節(jié)題為主。主要在于正確的審題，帶著重要信息到文章里面到出處，答案往往就在這些句子中。
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A．are rich in plants and animals
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