高中英语-Book 4 unit 2 Working the land using language教学课件设计

高中英语人教版必修4第二单元UsingLanguage吃动物怕激素；吃植物怕毒素；喝饮料怕色素；能吃什么，心里没数。－－－全国人大代表金志国带到两会上的顺口溜Whatisthematterweputonthesoilwhichmakescropsgrow?Itisfertilizer.chemicalfertilizers

natural

fertilizersReading

CHEMICALORORGANICFARMING?Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.FastreadingProblemscausedbychemicalfertilizersMainideaP1.P2.P3.P4.Whyarechemicalfertilizerssopopularinfarmingtoday?Theycanstopcropdiseaseandincreaseproduction.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.CarefulreadingParagraph1Whatproblemscanbecausedbyusingchemicalfertilizers?Theycandamagethelandbykillinghelpfulbacteriaandpestsandbystayinginthegroundandundergroundwaterforalongtime.Theydamagepeople'shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.

ProblemscausedbychemicalfertilizersParagraph2Paragraph3

Whatisorganicfarming?

Farmingwithoutusingchemicals.

Farmersandcustomersturntoorganic

farming.Findandwritedownthemethodsandadvantagesinthepassage.MethodsoforganicfarmingAdvantagesofmethodsParagraph3Farmersusenaturalwastefromanimals.Thismakesthesoilricherinmineralsandsomorefertile.MethodsoforganicfarmingAdvantagesof

methods

Farmersoftenchangethekindofcropineachfieldeveryfewyears.Changingthecropsrenewsthemineralsinthesoilandhelpsitbecomerichandhealthy.Farmersplantcropswithdifferentlengthsofroots.Thisusesdifferentlevelsofsoil.Farmerssometimesplantgrassbetweencropsandleaveitintheground.Thispreventswindorwaterfromcarryingawaysoilandactsasanaturalfertilizer.Paragraph4Othermethodstokeepthesoilfertile.Whatisthegoalofusingorganicfarmingmethods?Togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth.Paragraph4

In______days,

scientists______________(discover

)that____(use)chemicalfertilizersforalongtimecanhurtthelandandalsopeople’shealth.Thereareseveralproblems______(cause)bychemicalfertilizers.Theyhurtthehealthoftheland,stayinthewaterforalongtimeandgetintopeople’sbodies______theirfood.Organicfarmingisbecomingmorepopularwithsomefarmersandmanycustomersafterthesediscoveriescameout.Organicfarmingdoesnotuseany__________.Therearemanyorganicfarmingmethodsformakingtheland_______(health)andproductive.Allofthesemethodstrytoproducegoodfoodand________(keep)theenvironmentandpeoplehealthy.recenthavediscoveredusingcausedthroughchemicalshealthytokeepSummaryExpressions

1.化肥2.对…造成损害3.洗掉某物4.导致;造成(后果);通往5.逐渐增强,建立6.另外(还有)7.使…免受(影响);

使…不含(有害物)8.集中(注意力、精力)于9.每隔几年10.避免做…chemicalfertilizerscause/dodamagetowashoffleadtobuildupinaddition(to)keep…freefrom/offocusoneveryfewyearsavoiddoingLanguagepoints1.Manyofthesechemicalscanleadtocancerorotherillnesses.leadto:

Toomuchworkandtoolittlerest

often

leadtoillness.过量的工作和过少的休息会引起疾病。Hismistakes________hisfailure.Allroads_______Rome.

ledto

leadto

causeresultin,bringabout导致；造成2.Theyfocusonkeepingtheirsoilrichand

freeofdisease.focuson:

集中(注意力，精力等）于Youshouldfocusyourattentionon

your

work.

Focusonlife.

瞄准生活。Please_____yourmind___

the

followingproblem.focusonconcentrateonListentothedialogueand

decideifthe

followingstatementsaretrueorfalse,accordingtotheconversation.Giveyourreasons.1.PaulthinksthatCarrieisnottellinghimthetruth.2.Usingchemicalfertilizersalwaysmakesvegetablesemptyinside.TrueFalse3.Today’sfruitisnotashealthyforpeopleasfruitfiftyyearsago.4.Eatingmorevegetablesmightnotalwaysbegoodforus.5.Alloftoday’svegetableslookhealthybutinfactarenot.FalseTrueTrueSpeakingThefarmerispersuadingthecustomertobuyhis/her“greenfood”.

Youneedto…Theadvantagesare…I’dprefer…because…What’stheadvantageof…ShouldI/we...?It’sbetterto…It’smoreexpensivebut…Idon’tlike…because…I’drather…Thisisgoodvaluebecause…You’lltastethedifferencewhen…IfIhaveachoiceI’llchoose…It’sagreatpitythat…Sampledialogue:F=FarmerC=CustomerF:Goodmorning!Wouldyoulikesomeorganiccarrotsthismorning?C:Hmm…They’realittleexpensive!Whatistheadvantageof…？F:Theadvantageofthesevegetablesisthattheyaregreenfoodsothey’resafetoeatandgoodforyourfamily.C:Butwhat’stheadvantageofhavinggreenfood?Iknowallvegetablesaregoodforyouandthosedowntheroadlookgreentoo.AndIcanbuythemathalfthepricethere.F:Well,letmeexplain.I’dratherfeedmyfamilyongreenfoodthanothervegetablesbecausetheyaregrownwithoutchemicalfertilizers.C:Butthepriceistooexpensive!I’dprefertobuygoodfoodifIcanaffordit.F:Thisisgoodvalueformoneybecauseyou’llhavehealthierchildren.Theywon’thavetotaketimeoffwork.Inthelongrunyou’llbebenefit.C:CertainlyI’dliketobuywhatissafeandhealthy.PerhapsI’lltrysomeofyourvegetablesandi