Unit 5 Using language Reading for writing 课件 高中英语人教版（2019）选择性必修第一册

UsinglanguageReadingLead-inDoyouwanttohavealandofyourown?Whatwillyougrowifyouhavealand?

chemicalfertilizersnaturalfertilizersChemicalfarming

farmingusingchemicalpesticidesandartificialfertilisers.Organicfarming

simplyfarmingwithoutusinganychemicals.ChemicalVersusOrganicFarmingAWhatorganicfarmingisBWhyman-madechamicalarestillusedinfarmingCOrganicmethodsforproducingrichsoilDTheproblemswithchemicalfarminngPara1-2:()Para3:()Para5:()Para4:()ReadforstuctureDACBDTheproblemswithchemicalfarminng

Para1-2AWhatorganic

farmingisPara3COrganicmethodsforproducingrichsoilPara4BWhyman-madechamicalarestillusedinfarmingPara5ChemicalfarmingOrganicfarmingThinkingChemicalfarming

Para1-2CHEMICALVERSUSORGANICFARMINGChemicalpesticidesandartificialfertilisershavebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.Overtime,however,whatsomescientistshavefoundisthattheirlong-termusecansometimesharmboththelandandpeople’shealth.此句中包含两个从句，分别是what引导的____从句，what在此从句中充当___语；

以及that引导的_____从句，that在此从句中___成分；____实际意义，但___省略Chemicalpesticidesandartificialfertilisers_________(be)inwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthem_______agreatwaytofightcropdiseaseandincreaseproduction.Overtime,_________,whatsomescientistshavefoundis________theirlong-termusecansometimesharmboththeland_______people’shealth.havebeenashoweverthatandForexample,pesticidescandamagethelandbykillingnotonlyharmfulbacteriaandinsects,butalsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.Manypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilisers,cropsgrownwiththemusuallygrowtoofastto

berichinnutrition.Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthanessentialminerals,andtheyoftenhavelessflavouraswell.此句中grownontheland是过去分词短语做_____语；修饰_____;此句中的whodigestthem是_____从句，其先行词是_____essential:essence本质；实质；inessence从本质上讲beessentialto对....很重要Itisessential(forsb)todosth(对某人来说)做某事很重要Itisessentialthat...(should)do做...很必要1.Waterandfoodareessential_____livingthings(生物)2.Itisgoodforyoutolearntoreadbodylanguage,whichisessentialto_____(develop)yoursocialskills3.Asweallknow,itisessentialforstudents______(make)carefulpreparationsfortheexam.4.每个学生都必须有充足的睡眠和规律的锻炼Forexample,pesticidescandamagethelandby______(kill)notonlyharmfulbacteriaandinsects,_______alsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumans_______digestthem.Manypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.Infact,somepesticides_______DDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycause____peopleandtheenvironment.Asforchemicalfertilisers,cropsgrownwiththemusuallygrowtoofast_____(be)richinnutrition.Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan

essentialminerals,andtheyoftenhave______(little)flavouraswell.killingbutwholiketotobeless1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?(Para1)

Advantages:Manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.2.Whatconcernsmanypeopleabouttheuseofpesticides?(Para1)

Disadvantages:Theirlong-termusecansometimesharmboththelandandpeople’shealth.3.Whatisoneproblemwiththeuseofchemicalfertilisers?(Para2)

Disadvantages:Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.OrganicfarmingPara3-4Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.Forexample,manyorganicfarmersusenaturalwastefromanimalsasfertiliser.Thismakesthesoilintheirfieldsricherinminerals.Italsokeepstheair,soil,water,andcropsfreeofchemicals.analternativeto......的替代品havenoalternativetodosth别无选择只能做某事alternativeenergy替代能源alternativelifestyle/values非传统的生活方式/价值观“不得不做某事”的其他表达：can’tbutdosth;can’tchoose/helpbutdobyallmeans当然行；可以bynomeans绝不bymeansof借助...的手段；依靠...的方法As______alternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfood_____theyshopatthelocalgrocery.Organicfarmingissimplyfarming_______usinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfree_____diseasethroughnaturalmeans.Forexample,manyorganicfarmersusenaturalwastefromanimals____fertiliser.Thismakesthesoilintheirfieldsricherinminerals.Italsokeepstheair,soil,water,____cropsfreeofchemicals.anwhenofaswithoutandOrganicfarmersalsousemanyothermethodstoproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear.Forinstance,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Organicfarmersalsoplantdiversecropsthatusedifferentdepthsofsoiltohelpkeepitrich.Forexamplepeanutsgrowontheground’ssurface,butmanyothervegetablesputdowndeeproots.Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.adj.highwidelongstrongbroadn.v.heightheightenwidthwidenlengthlengthenstrengthstrengthenbroadenroot.根；根茎;根源1.Weneedtogettotherootoftheproblembeforewecansolveit.2.Sincethatday,adreamhastakenrootinmyheart.3.Nocountry,nohappiness.Everyonemustberootedinthesoilofthemotherland.问题的根源在心里扎根植根于Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.此句是由why引导的___从句，why在此从句中___成分，____意义，意为_____;because引导____从句，because在此从句中___意义，意为____.making...crops做____状语Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.此句是的主语是______Organicfarmersalsousemanyother_____(method)toproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear._____instance,theymaygrowcorn___wheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrown____(be)becausetheyputimportantmineralsbackintotheground,_____(make)itreadyforthenextbatchofcrops.Organicfarmersalsoplantdiversecropsthatusedifferent____(depth)ofsoiltohelpkeepitrich.Forexamplepeanutsgrow____theground’ssurface,butmanyothervegetablesputdowndeep___(root).Thegoalofusingdifferentorganicfarmingmethods____(be)togrowgoodfoodwhileavoidingdamagetotheenvironmentor____people’shealth.methodsFororismakingdepthsonrootsisto4.Howisorganicfarmingdifferentfromchemicalfarming?(Para3)

Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.5.Whataretheorganicmethodsmentionedinthetext?(Para3&4)

1.usenaturalwastefromanimalsasfertilizer.2.changethekindofcropgrownineachfieldeveryyear.3.plantdiversecropsthatusedifferentdepthofsoiltokeepitrich.6.What'sthegoalofusingorganicfarmingmethods?（Para4）

Advantages:Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Somepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.Whatkeepsthemfromdoingsoisthefactthatchemicalfarmingservesthehighdemandforfoodaroundtheworld.Organicfarmingisnowherenearabletomeetthatneed.Therefore,thereisstillalongwaytofindasuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.prefertodoratherthandopreferdoingtodoingprefer____(n)nowherenear完全没有；远不及Eg.Weonlyhad$100andthatwasnowherenearenoughtobuyanewcomputer.1.Youcangetnowherewithoutanobjectiveinlife.2.Iwascrossingthestreetwhenacarappearedoutofnowhere.没有结果；没有进展突然出现Whatkeepsthemfromdoingsoisthefactthatchemicalfarmingservesthehighdemandforfoodaroundtheworld.本句包含what引导的___从句，what在