话题阅读·单元导入 Longji Rice Terraces Imagine mountains wrapped in silver water，shining in the spring sun.Summer sees the mountains turn bright green with growing rice. During autumn，these same mountains are gold，and in winter they are covered in sheets of white frost.These are the colours of the Longji Rice Terraces. These terraces were built by the local Zhuang and Yao people，to whom Guangxi is home.Starting in the Yuan Dynasty，work on the terraces took hundreds of years，until its completion in the early Qing Dynasty.Reaching as far as the eye can see，these terraces cover tall mountains，often from the bottom to the very top. So why did these people go to so much trouble to turn the entire mountains into terraces Firstly，there are few large，flat areas of land in the region.Building the terraces therefore meant that they could increase the areas in which they could grow rice.Secondly，although the region has plenty of rain，the mountains are steep and the soil is shallow.The flat terraces catch the rainwater and prevent the soil from being washed away. [词海拾贝] 1．terrace n. 梯田 2．frost n. 霜 3．completion n. 完成；结束 4．region n. 地区，区域 5．steep adj. 陡的；陡峭的 6．shallow adj. 浅的 [我学我思] Why did local people build terraces Firstly，there are few large，flat areas of land in the region.Building the terraces therefore meant that they could increase the areas in which they could grow rice.Secondly，the flat terraces catch the rainwater and prevent the soil from being washed away.Section Ⅲ Using Language 第一步：细读 知细节明察秋毫 Read the text on Pages 55－56 carefully，and then choose the best answer. 1．Why did many farmers welcome the introduction of chemical pesticides A．They can fight crop disease and increase production. B．They harm both the land and people's health. C．They can help produce rich soil. D．They are not expensive. 2．What concerns many people about the use of pesticides A．Pesticides can damage the land. B．Chemicals can stay in the soil for a long time. C．Pesticides may kill harmful bacteria and insects. D．Chemicals may make people ill and even cause cancer. 3．What can we know from the passage A．The chemicals in the soil will soon disappear. B．Pesticides are of great benefit to helpful bacteria. C．Crops grown with chemical fertilisers can provide more essential minerals. D．Crops grown with chemical fertilisers usually grow too fast. 4．What is the author's purpose of writing the passage A．To call on farmers to turn to organic farming. B．To introduce some good ways to make the soil rich. C．To urge the government to stop using pesticides. D．To give some advice on how to increase the output of crops. 答案：1～4 ADDA 第二步：填空 辨难句拆分解读 1．When they were first introduced，many farmers welcomed them as a great way to fight crop disease and increase production.(P55 Para.1) [结构分析] 此句是复合句，When引导的是时间状语从句，动词不定式to fight...作后置定语，修饰a great way ... ...
