第一部分阅读理解（共两节，满分40分）
第一节（共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A 、B 、C 和 D ）中选出最佳选项，并在答题卡上将该项涂黑
A
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．
