Unit 5 Working the Land Section Ⅲ Using language-【精讲精练】2023-2024学年高中英语选择性必修第一册人教版(改后)(教师用书)

享学科网书城国 品牌书店·知名教辅·正版资源 b.zxxk.com 您身边的互联网+教辅专家 Section Ill Using language 篇章助读释疑 原文呈现 CHEMICAL VERSUS ORGANIC FARMING Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century.When they were first introduced,many farmers welcomed them as a great way to fight crop disease and increase production.Over time,however,what some scientists have found is that their long-term use can sometimes harm both the land and people's health ①是复合句。句中what引导主语从句，且在从句中作宾语，hat在句中引导表语从句。 For example,pesticides can damage the land by killing not only harmful bacteria and insects,but also helpful ones.In addition,these chemicals can stay in the soil and underground water sources for a long time.2This affects the crops grown on the land and,in turn,the animals and humans who digest them.Many people worry that these chemicals may make them ill and even cause cancer.In fact,some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often have less flavour as well. ②是复合句。句中grown on the land and为过去分词短语作后置定语，修饰名词crops: who在句中引导定语从句，修饰先行词humans。 As an alternativeB,some farmers have switched to organic farming,and many customers have turned to organic food when they shop at the local grocery.Organic farming is simply farming without using any chemicals.Organic farmers focus on keeping their soil rich and free of disease through natural means.For example,many organic farmers use natural waste from animals as fertiliser.This makes the soil in their fields richer in minerals It also keeps the air,soil, water,and crops free of chemicals. Organic farmers also use many other methods to produce rich soil.They often change the kind of crop grown in each field every year.Fo