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Wordspreviewchemicalproductionbacteriapestnutritionmineraladj.化学的；关于化学的n.生产；制造n.细菌n.害虫；害兽；害鸟n.营养；滋养；食物n.矿物；矿石discoveryfocussoilreducerootn.发现；发觉n.焦点；中心点vt.集中；聚焦n.土壤vt.减少；减缩n.根；根源Wordspreviewskimunderlinesummarycommentvt.浏览；略读vt.画底线标出；强调n.总结；摘要；概要n.评论；议论vi.&vt.表达意见;做出评论WordspreviewExpressionspreviewbuildupleadtofocusonkeep…freefrom/of逐渐增强;建立;开发导致;造成(后果)集中(注意力，精力等)于使…免受(影响，伤害等)；使…不含(有害物)OrganicFarmingWhataregenetically-modifiedfoods?ThetermGMfoodsorGMOs(genetically-modifiedorganisms)ismostcommonlyusedtorefertocropplantscreatedforhumanoranimalconsumptionusingthelatestmolecularbiologytechniques.WhataresomeoftheadvantagesofGMfoods?Theworldpopulationhastopped6billionpeopleandispredictedtodoubleinthenext50years.Ensuringanadequatefoodsupplyforthisboomingpopulationisgoingtobeamajorchallengeintheyearstocome.GMfoodspromisetomeetthisneedinanumberofways:1).pestresistance2).diseaseresistance3).coldtolerance4).droughttolerance/salinitytolerance5).nutritionWhataresomeofthecriticismsagainstGMfoods?MostconcernsaboutGMfoodsfallintothreecategories:environmentalhazards,humanhealthrisks,andeconomicconcerns.Readandanswer:Whatisthemainideaofthispassage?Thispassagetellsussomethingaboutorganicfarming.Itmeansgrowingcropswithoutchemicalfertilizerswhichdamagethesoil.Theorganicfarmerskeepthesoilrichandhealthyinseveralways.1Whyarechemicalfertilizerssopopularinfarmingtoday?2Whatproblemscanbecausedbyusingchemicalfertilizers?3Whatisorganicfarming?4Whatisthemainreasonforusingorganicfarmingmethods?Readthepassageandanswerthefollowingquestions.1Whyarechemicalfertilizerssopopularinfarmingtoday?Theyareagreatwaytostopcropdiseaseandincreaseproduction.2Whatproblemscanbecausedbyusingchemicalfertilizers?Theycandamagethelandbykillinghelpfulbacteriaandpetsandbystayinginthegroundandundergroundwaterforalongtime,Theydamagepeople'shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.3Whatisorganicfarming?4Whatisthemainreasonforusingorganicfarmingmethods?Organicfarmingmeansgrowingcropswithoutusinganychemicals.Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.Findandwritedownthemethodsandadvantagesinthepassage.MethodsoforganicfarmingAdvantagesofmethodsFarmersusenaturalwastefromanimals.Thismakesthesoilricherinmineralsandsomorefertile.MethodsoforganicfarmingAdvantagesofmethods1Farmersusenaturalwastefromanimals.1Thismakesthesoilricherinmineralsandsomorefertile.2Farmersoftenchangethekindofcropineachfieldeveryfewyears.2Changingthecropsrenewsthemineralsinthesoilandhelpsitbecomerichandhealthy.MethodsoforganicfarmingAdvantagesofmethods3Farmersplantcropswithdifferentlengthsofroots.3Thisusesdifferentlevelsofsoil.4Farmerssometimesplantgrassbetweencropsandleaveitintheground.4Thispreventswindorwaterfromcarryingawaysoilandactsasanaturalfertilizer.Languagepoints1Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.buildup增强;建立；开发Hardworkingconditionsbuildupcharacter.艰苦的工作条件能磨练人的性格。2Manyofthesechemicalscanleadtocancerorotherillnesses.leadto:导致；造成Toomuchworkandtoolittlerestoftenleadtoillness.过量的工作和过少的休息会引起疾病。AllroadsleadtoRome.条条大道通罗马。3Theyfocusonkeepingtheirsoilrichandfreeofdisease.focuson:集中(注意力，精力等）于Youshouldfocusyourattentiononyourwork.把注意力集中在你的工作上。Olympus:Focusonlife.奥林巴斯：瞄准生活。4Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.keeps…freefrom/of:使…免受（影响，伤害登）；使不含（有害物）keepfrom:阻止;妨碍Ihopeyouwillkeepfromdoinganythingrash.我希望你不要做出任何鲁莽的事情来。Listeningchemicalfertilizercowdung用化学肥料和有机肥料的区别:Thepossiblebadeffectsofchemicalfertilizersonthefruitandvegetablesthatweeattoday.Asyoulistentothisdialogue,keepinmindwhatyouhavejustreadaboutchemicalfertilizers.Whatisthemaintopicoftheconversation?Listentothedialogueasecondtime.Decideifthefollowingstatementsaretrueorfalse,accordingtotheconversation.Giveyourreasons.1PaulthinksthatCarrieisnottellinghimthetruth.2Usingchemicalfertilizersalwaysmakesvegetablesemptyinside.TrueFalse3Today’sfruitisnotashealthyforpeopleasfruitfiftyyearsago.4Eatingmorevegetablesmightnotalwaysbegoodforus.5Alloftoday’svegetableslookhealthybutinfactarenot.FalseTrueTrueListeningtextWHAT’SWRONGWITHTHEVEGETABLES?Girl:Hey,Paul,listentothis…amagazinearticleaboutafarmerwhousedtoomuchchemicalfertilizeronhisfields.Whenhisvegetableswerepicked,theywereallfoundtobeempty!BOY:Empty?You’rejoking,Carrie…thatcan’tbetrue!Girl:Ididn’tbelieveiteither!Thisarticlesaysthiscanhappensometimeswithvegetableslikecucumbers,carrotsandpumpkins.Thischemicalfertilizermakesthevegetablesgrowfasttolookbigandbeautiful,butthey’reemptyinside!BOY:Youknow,I’venoticedthatsometimesmymumbuyscarrotsfromthesupermarketthathavebigholesdownthecenter.Iguessthatmustbefromusingchemicalfertilizers!GIRL:Yeah,that’swhatthemagazinesays!Themainpointofthearticle,though,isn’taboutholesinourvegetables.It’stalkingaboutwhythefruitandvegetablesweeattodayaren’tasnutritiousastheonesourgrandparentsate.BOY:What?Mymumisalwaystellingmetoeatmorevegetables,becausethey’regoodforme!GIRL:Yeah,Iknow–mymothersaysthatsamething!Andit’strue-theyaregoodforus…buttheproblem