【正文】
rich farmland into a desert wasteland. So does this mean we shouldn?t build a highway or plow a field? Of course not. But it does mean we might think about Earth—friendly ways of doing those things. Today farmers plow their fields in different ways to prevent erosion. They try to use less water for their crops. They keep animals from eating the growing grass in just one area. Farmers also plant trees to prevent erosion from happening. Save the Trees Another human activity that damages the land is deforestation(采伐森林 ). People take away a large number of trees from a forest. Millions of square kilometers of forest disappear each year. When this happens, many plants and animals lose their places to live. They may die out, or bee very few. Scientists haven?t even discovered all the living things in the forest. We may be losing some without even knowing they are there. Trees absorb (吸收 )and use carbon dioxide (二 氧化碳 )when they make food. Environmentalists encourage careful management of the forests. They ask people to replant trees after they cut down the forest. Recycle, Reuse, Reduce People throw a piece of paper into the wastebasket after using it. The paper bees trash. Where does the trash go next? Much of our trash ends up in landfills(垃圾填埋地 ). They take up valuable land and sometimes pollute the water, air, and land around them. More than a third of the trash in landfills is paper. Recycling, reusing, and reducing what you throw away can cut down on the need for more landfills. In fact, we can recycle about eighty percent of household trash. 37. What does the underlined word erosion mean? A. Plowing fields and mining B. Cutting down trees and farming. C. Wind and rain carrying away soil. D. Building highways on the farmland. 38. Why do we need to save the trees? A. To discover more new trees every year. B. To encourage careful management of the forest. C. To take away a large number of trees from the forest. D. To keep good places for animals and plants to live in. 39. How much of the trash can we recycle? A. All the trash. B. Very little. C. One third. D. Four fifths. 40. What?s the purpose of the author writing the passage? A. To ask people to look for places to plant trees. B. To tell people how to protect n atural resources. C. To show how the lands are destroyed by people. D. To discuss ways of protecting animals and plants. **C Growing up in Philadelphia, Lieberman started cooking with his stayathome dad when he was seven. His foodloving family had two kitchens, and he quickly learned what was the best way to bake his cakes. Lieberman improved his kitchen skills greatly during a year abroad before college, learning from a cook in Italy and studying local specialties (地方特色菜) in Germany, Spain and France. At Yale, he was known for throwing dinner parties, singlehandedly frying and baking while mixing drinks for dozens of friends. Just for fun, he and some frien