Question

make,more and more,bring,be, 

many,try,change,grow,without,blow  

  Scientists 1       to make the deserts (沙漠) into good lands again. They want 2        water to the deserts,so people can live there and grow food. They are learning a lot about the deserts. But 3       land is becoming desert all the time. Scientists may not be able 4        the deserts. They think that people 5        deserts. People are doing bad things to the earth.

  Some places on the earth don't get 6        rain. But they still don't become deserts. This is because some green plants 7        there. Small green plants and grass 8        very important to dry (干旱的) places. Plants don't let the hot sun make the earth drier. Plants don't let the wind 9        the sand away. If a little rain falls,the plants hold the water. 10       plants,the land will become a desert much more easily.

1.       2.        3.        4.         5.         

6.         7.        8.       9.         10.         

Answer 1

1. are trying   2. to bring   3. more and more

4. to change   5. make   6. much   7. are growing   

8. are   9. blow   10. Without