英语教学课件：Unit 5 Reading for Writing 课件 高一下学期英语人教版 选择性必修第一册

ReadingforWritingP55-57

Unit5WorkingtheLand新人教选择性必修Book1

Itisfertilizer.

Whatisthesubstanceweputonthesoiltomakecropsgrow?Pre-readingWhatkindoffertilizersdofarmersuse?chemicalfertilizersnaturalfertilizers

What’retheadvantagesoforganicfarming?Doyouusuallyeatorganicfood?Doyouthinkorganicfoodaremorehealthy?Whatarethedisadvantagesofusingchemicalfertilizers?Think＆discussOrganicFarmingReadthetext:While-reading1Whydidmanyfarmerswelcometheintroductionofchemicalfarming?

Manyfarmerswelcomedthemasagreatwaytofightcropdiseasesandincreaseproduction.2Whatconcernsmanypeopleabouttheuseofpesticides?

Theirlong-termusecansometimesharmboththelandandpeople'shealth.3Whatisoneproblemwiththeuseofchemicalfertilisers?

Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.Read＆answerRead＆answer4Howisorganicfarmingdifferentfromchemicalfarming?Organicfarmingissimplyfarmingwithout

usinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseases

throughnaturalmeans.5Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?Differentcropsaregrownbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.

COrganicmethodsforproducingrichsoil

DTheproblemswithchemicalfarmingPara.1-2Para.3Para.4Para.5Read＆match

AWhatorganicfarmingis

BWhyman-madechemicalsarestillusedinfarmingbacteriaandinsectsprohibiteddamagetheyusegrowtoofastnutritionnaturalwastefromanimalseveryyeardifferentdepthsdemandforfoodaroundtheworldRead＆completechangethekindofcropChemicalpesticidesandartificialfertilisershavebeeninwidespreaduseinfarming.____Pesticidescandamagethelandbykillingonlyharmfulbacteriaandinsects.____Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.____Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.____TTFTTrueorfalsenotonly...butalsohelpfulones

Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Post-readingThegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Yes,Ithinkthisgoalcanbereached.Farmersworkedforcenturieswithoutusinganykindsofchemicalsandwithoutharmingtheenvironment,andthefoodtheyproducedwasjustfine.Unit5WorkingtheLand新人教选择性必修Book1

Languagepoints

P55-56课文回顾句意：

这会影响到生长在土地上的农作物，反过来也会影响到消化它们的动物和人类。Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.digestvt.消化；吸收

n.

文摘；摘要Shecouldn'tdigestfoodproperly.

她无法正常消化食物。Theylearnwellbutseemtoneedtimetodigestinformation.

他们学得很好，但似乎需要时间来吃透这些知识。句意：

这会影响到生长在土地上的农作物，反过来也会影响到消化它们的动物和人类。Thisaffectsthecropsgrownonthelandand,inturn,urn

反过来；转而；轮流，依次

Therewerecheersforeachofthewomenastheyspokeinturn.

女士们依次发言时，每一位都得到了喝彩。Therays,inturn,decimatedthebayscalloppopulationsaroundNorthCarolina.

反过来，这些鳐鱼又大量捕杀了北卡罗来纳州周围的海湾扇贝。Therewerealternativemethodsoftravelavailable.有另外的旅行方式可采用。Communityserviceisseenastheonlycrediblealternativetoimprisonment.除监禁外，社区劳动被看作是唯一可接受的选择。Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.句意：作为一种选择，一些农民已经转向有机农业，许多顾客在当地杂货店购买有机食品。alternative

n.供替代的选择

adj.供选择的；选择性的坐在扶手椅上看书。完成句子：Weareverysadtohavetodothis,butthereisnootheralternativenow.

我们为不得不这么做而感到难过，但是现在没有其他的选择。Thesoldierhadnoalternativebuttoobeyorders.

士兵们除了服从命令别无选择。Doyouhaveanalternativesolution?

你有没有别的解决办法？Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.句意：种植不同的作物是因为它们把重要的矿物质放回地下，使它为下一批作物再次做好准备。句子结构分析why引导的主语从句because引导的表语从句现在分词作状语系动词如何写表达观点的文章发表议论就是通过议论或说理来表达作者的见解和主张，作者对某一问题持有一种看法，为了使读者同意自己的看法，提出若干理由，试图说服别人。发表议论时，我们要注意三个要素：论点、论据、论证。

Writeanargumentativeessaygivingyouropiniononchemicalororganicfarming.

明确体裁话题确定时态人称

布局文章架构

列出核心要点

Writeanargumentativeessay.开头：介绍农业发展概况和有机农业的出现。展开论述：分层次介绍化学农业和有机农业的区别，有机农业的优势。结尾：总结观点，提出建议。支持有机农业文体：议论文以现在时为主、兼顾过去时、将来时；第一、三人称1.化学农业的缺点。2.有机农业的优点，人们对健康的重视和选择有机农业的理由。•Istheauthorofthepassagefororagainstorganicfarming?Howdoyouknow?•Whatotherdisadvantagesofchemicalfarmingdidtheauthornotlist?•Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming?•Whatotherdisadvantagesoforganicfarmingcanyouthinkof?Step1Discussthesequestionsingroups.

Step2Decidewhetheryourgroupsupportschemicalfarmingororganicfarming.Topicsentence:Inmyopinion,_______farmingispreferableto____________farmingbecause____________________________Point1:_________________________________________（Detail）_________________________________Point2:_________________________________________（Detail）_________________________________Point3:_________________________________________

（Detail）_________________________________Conclusion:______________________________________Step3Useyouroutlinetowriteashortessaygivingyouropiniononthetopic.SampleWritingInmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebeneftstotheenvironmentastopeople,andbecauseorganicfoodismorenutritious.

Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,normalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.Thisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”,thatis,tokillinsects.Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.Whileitmaybetruethatthefoodweeatdoesnothaveenoughpesticideinittokillusimmediately,overtheyearsthispesticidemaycauseushealthproblemsorgiveusdiseasessuchascancer.Finally,organicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicals.Ifyourememberafewyearsago,therewasthecaseofwatermelonsliterallyexplodinginthefieldsbecausetheyhadbeengivenchemicalstomakethemgrowfaster.Thereasonwhytheyexplodedwasthattheycontainedtoomuchwater,becausethefarmershadusedtoomanychemicalsandtheweatherwasunusuallywet.Asitt