| 阅读理解。 |
| Scientists(科学家) are trying to make the deserts (沙漠) 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 deserts . Scientists think that people make deserts . People are doing bad things to the earth . Some places on the earth don’t get very much rain . But they still don’t become desert . This is because some green plants are growing there . Small green plants and grass are very helpful to dry places . Plants don’t let the hot sun make the earth even drier . Plants don’t let the wind blow the earth away . When a little bit of rain falls , the plants hold the water . Without plants , the land can become a desert much more easily . |
| 1. Why can the land become a desert ? A. Some places don’t get very much rain B. Plants don’t let the hot sun make the earth even drier . C. People don’t keep the earth well D. Scientists haven’t learnt enough about the deserts . 2. Scientists ______ to make the deserts into good land again . A. carry water B. grow food C. do nothing D. study a lot 3. Which is not true ? A. The land never stops becoming deserts . B. Scientists ask the people to live in the deserts and grow food there . C. People do bad things to the earth . D. scientists may not be able to change the deserts . 4. Why are green plants and grass helpful ? A. They can hold the water . B. They can stop the wind from blowing the earth away . C. They can keep the earth wet . D. All the above . 5. Which is the best title (题目) for the passage ? A. The Desert Problem B. People Make Deserts C. Green Plants and Grass D. The Desert , the Tree and the Water |