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b. friendly c. strange d. happy 15. a. push b. look c. change d. knock 16. a. think b. guess c. show d. see 17. a. them b. it c. her d. him 18. a. ask b. wish c. tell d. show 19. a. matter b. accident c. cry d. noise 20. a. looked b. jumped c. started d. stopped 三 . 閱讀理解: 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 being desert all the time. Scientists may not be able to change the desert in time. Why is more and more land being desert? Scientists think that people make deserts. People are doing bad things to the earth. Some places on the earth don39。t get very much rain. But they still don39。t bee deserts. This is because some green plants are growing there. Small green plants and grass are very important to dry places. Plants don39。t let the hot sun make the earth ever drier. Plants don39。t let he wind blow the dirt away. When a little bit of rain falls, the plants hold the water. Without plants, the land can bee a desert much mor easily. 1. Deserts ____. a. get very little rain b. never have any plants or animals in them c. call all be turned into good land before long d. both a and c 2. Small green plants are very important to dry places because ____. a. they don39。t let the sun make the earth ever drier b. they don39。t let the wind blow the earth away c. they hold water d. all of the above 3. Land is being desert little by little because ____. a. plants can39。t grow there b. there is not enough rain c. people haven39。t done what scientists wish them to do d. scientists know little about the deserts 4. Which is the main idea of the first paragraph? ____. a. Scientists know how to change desert into good land b. Land is being d