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1、Unit 5 WORKING THE LANDSection C Using LanguageCONTENTSLeading-inWhile-classAfter-classPart 1Part 1Part 2Part 2Part 3Part 3Part.1Leading-inLeading in1.Look at the title of the passage and try to guess what will be talked in the passage.2.If you were asked to write the passage under this title,what i
2、s your structure?Leading inChemicalfarmingVsOrganicfarmingChemical farmingorganic farmingadvantagesdisadvantagesadvantagesdisadvantagesMy choice/attitudePart.2While-classWhile-class核心词汇教材原句教材原句 This affects the crops grown on the land and,in turn,the animals and humans who digest them.这影响了生长在土地上的作物，
3、进而影响了消化它们的动物和人类。这影响了生长在土地上的作物，进而影响了消化它们的动物和人类。1 in turn 相应地；转而；依次；轮流This in turn attracts more users and advertisers，and so on.这反过来又吸引了更多的用户和广告商等。We will examine each of these methods in turn.我们将依次逐个分析这些方法。【归纳拓展归纳拓展】take turns to do/in doing sth.轮流做某事Its ones turn to do sth.轮到某人做某事了。by turns 轮流地，交替地
4、。While-class教材原句教材原句 As an alternative,some farmers have switched to organic farming.作为另一种选择，一些农民转向有机农业作为另一种选择，一些农民转向有机农业2 alternative n.&adj.（1）n.可供选择的事物 There is an alternative that should be welcome to all.还有一个替代方案，可能所有人都会欢迎。【归纳拓展归纳拓展】have no alternative/choice but to do.cant choose but to do.I h
5、ad no alternative but to accept the offer.我除了接受该项提议之外，别无选择。（2）adj.（仅用于名词前）可供替代的，可供选择的；非传统的 alternative energy 替代性能源 alternative ways/approaches/methods 其他的方法 alternative suggestions 可供选择的建议 除做之外别无选择While-class教材原句教材原句 Organic farmers focus on keeping their soil rich and free of disease through natur
6、al means.有机农场主注重通过自然的方式保持土壤的肥沃和免受病害。有机农场主注重通过自然的方式保持土壤的肥沃和免受病害。3 focus on 关注，聚焦于搭配：focus ones attention/mind on 集中某人的注意力/心思于The discussion focuses on the death rate in traffic accidents.此次讨论集中在交通事故的死亡率上。I regret not having focused my mind on my study.我后悔没把心思放在学习上。When someone delivers a speech，you m
7、ust focus on understanding his main ideas.当有人讲话时，你必须集中注意力理解他的主要思想。【归纳拓展】fix ones attention on 把某人的注意力集中于concentrate on 集中（注意力、精力）于pay attention to 注意put ones heart into 全神贯注于While-class 教材原句教材原句 Organic farmers also plant diverse crops that use different depths of soil to help keep it rich.有机农场主还种植多
8、种作物，利用不同深度的土壤来帮助保持肥沃。有机农场主还种植多种作物，利用不同深度的土壤来帮助保持肥沃。4 depth n.向下（或向里）的距离；深（度）搭配搭配：in depth 全面，深入，详细 at a depth of 30 metres 在 30 米的深处 a metre/foot in depth 一米/一英尺深 I havent looked at the report in depth yet.我还没仔细看这份报告。【词语积累词语积累】【单词助记单词助记】adj deep high wide long strong broad n.depth height width lengt
9、h strength breadth n.deepen heighten widen lengthen strengthen broadendeep adj.深的.deeply adv.很深地；深刻地+-ly+-endeepen v.变深 depth n.深(度)+-thWhile-class教材原句教材原句 Organic farming is nowhere near able to meet that need.有机农业远不能满足那样的需求。有机农业远不能满足那样的需求。5 nowhere near 远不及；离很远He should be let nowhere near the job
10、.不能让他有机会接近这个职位。【词语积累】nowhere adv.无处；任何地方都不 n.无处；任何地方；无名之地There was nowhere for me to sit.我无处可坐。Houses had sprung up out of nowhere on the hills.山丘上突然冒出一幢幢的房子。完成句子完成句子(1)It was （远 不 如）as painful as David had expected.(2)Ive （肯定不够）for the fare.(3)This animal is found in Australia，and （别处没有）.nowhere ne
11、ar nowhere else nowhere near enoughWhile-class重点句式教材原句教材原句 What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.阻止他们这样做的原因是化学农业满足了世界各地对粮食的巨大需求。阻止他们这样做的原因是化学农业满足了世界各地对粮食的巨大需求。【句式分析】本句中 that 引导同位语从句，对 fact 的具体内容进行解释说明。同位语从句同位语从句（1）可以跟同位语从句的名词
12、通常有 news，idea，fact，promise，question，doubt，thought，hope，message，suggestion，words（消息），possibility 等。（2）引导同位语从句的词常有连词 that，whether，连接副词 how，when，where 等。（注：if，which 不能引导同位语从句）I heard the news that our team had won.我听到了我们队获胜的消息。He must answer the question whether he agrees to it or not.他必须回答他是否同意这样一个问题。
13、While-classorganic farmingchemical farmingorganic farmingorganic farmingchemical farmingorganic farmingWhile-classStep II Test our predictionRead the text quickly and silently and try to find what is the main idea of each paragraph.And then draw the map of the structure.Para.1_Para.2 _Para.3_Para.4
14、_Para.5 _Chemical farming help fight crop disease and increase production.(advantage)Three disadvantages of chemical farming.(disadvantages)The definition of organic farming and one of its advantages.(advantage)Other different methods of organic farming and their advantages.(advantages)The disadvant
15、age of organic farming and show to the readers the attitude of the writer.(disadvantage&attitude)While-classChemical farmingVsOrganic farmingChemical farmingorganic farmingadvantagedisadvantagesadvantagesdisadvantageMy choice/attitudeWhile-classStep III Reading for detailsRead the text carefully and
16、 complete the table.Chemical farmingadvantageA great way to _.disadvantagesKill not only _ but also_.Affect not only _but also _.Crops are lacking in _.Organic farmingadvantagesThe soil is rich in _.Keep _free of chemicals.Avoid damage to _.disadvantageNowhere near able to _.The writers attitudeHe/S
17、he is for _.But there is still a long way to _.While-classChemical farmingadvantageA great way to fight crop disease and increase production.disadvantagesKill not only harmful bacteria and insects but also helpful ones.Affect not only the crops but also the animals and humans who digest them.Crops a
18、re lacking in nutrition.Organic farmingadvantagesThe soil is rich in minerals.Keep the air,soil,water and crops free of chemicals.Avoid damage to the environment or to peoples health.disadvantage Nowhere near able to meet the need.The writers attitudeHe/She is for organic farming.But there is still
19、a long way to find a suitable solution.Part.3After-classAfter-classStep V Writing an argumentative essay giving your opinion on chemical or organic farming.Task 1 Complete the outline below.Topic sentence:In my opinion,_farming is preferable to _farming because _ Point1_(Detail)_Point2_(Detail)_Poin
20、t3_(Detail)_Conclusion:_After-classTask 2 Use your outline to write a short essay giving your opinion on the topic,paying attention to using right transitional words.Task 3 Exchange posters with another pair.Use this checklist to give them helpful feedback.Does the writer do a good job of expressing his/her opinion?Does each paragraph have one main idea?Does each paragraph have at one detail to support its main idea?Does the writer sequence the points in logical order?Does the writer do gcod job persuading you to accept his/her opinion?Task 4 Polish your drafts and share with your partners.