高中英语 Unit 2 Working the land Working the land 课文导学案 新人教版必修4.doc

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1、WorkingthelandWarming-upandReading学习目标1.熟记重点单词和短语，会读、拼写以及使用；2.理解课文，快速掌握关键信息学习重难点掌握重点句型结构并能灵活运用学法指导词不离句，句不离篇。多读多练，记忆保鲜。学习过程生命课堂互动探究相关材料链接ModernAgricultureForthousandsofyearstraditionalagricultureinChinadidnotchangeverymuch.Mostfarmswereone-familybusinesses.AlthoughChinaisaverybigcountry,only7

2、%ofthelandcanbeusedforfarming.ItisonthisarablelandthatthefarmersproducefoodforthewholepopulationofChina.Itisfromtheearly1990sthatscientistsstartedtodevelopnewtechniquestoincreaseagriculturalproductionwithoutharmingtheenvironment.Chemicalfertilization,forexample,helpstoproducebettercrops,but

3、isharmfultotheenvironment.Newtechniquesshouldincreaseagriculturalproductionbutalsobefriendlytoenvironment.Futureagricultureshoulddependonhightechnologyaswellastraditionalmethods.Notonlyfoodproductionisimportantbutalsotakingcareoftheenvironment.ThebiggestproblemofChinesefarmersistheshortageof

4、arableland.Usingthelatesttechnologies,Chinesescientistsgrowvegetablesingreenhouses.Therootsofthesevegetablesarenotplantedinearthbuthanginwaterthatcontainsallthenutrientstheyneedtogrow.Today,manyvegetablesarenotgrowningardensbutingreenhouses.Theyareprotectedfromthewind,rainandinsects.Thetempe

5、ratureiscontrolledwithcomputers,orkeptthesame,nomatterhowtheweatherisoutside.重点句子1.In1974,hebecamethefirstagriculturalpioneerintheworldtogrowricethathasahighoutput.1974年，他成了世界上第一位种植高产水稻的农业先锋。[解释]不定式放在表示次序的词thefirst,thelast,thebest以及theonly,thevery,theright等词后面,且这些词与动词不定式有逻辑上的主谓关系，结构为：thefir

6、st/last/best/right/only/very/...+n.+todosth.第一个/最后一个/最好的一个/合适的/唯一的/恰好的……做某事的人/物，如：1).Heisalwaysthefirst(student)tocomeandthelasttoleave.他总是第一个来和最后一个离开的（学生）。2).Thelastmantoleavethesinkingshipwasthecaptain.最后一个离开正在下沉的船的是船长。[练习]根据句子意思填空。1).Ithinkheistherightperson________(tell)heraboutthis.2).I

7、’dbethefirst________(admit)Imightbewrong.2.Thisspecialstrainofricemakesitpossibletoproduceone-thirdmoreofthecropinthesamefields.这种特殊的稻种使得同样的田地多收获三分之一的产量。[解释]makeit+宾语补足语+动词不定式,it做形式宾语,动词不定式是真正的宾语，有时真正的宾语是从句。常和动词consider/think/make/find/believe/decl