Unit2WorkingthelandⅠ.阅读理解A体裁：说明文话题：农业词数：375时间：6′Organicfarmingisabig－pictureexercise.It'snotonlytargetedatthisseason'sresults，butconsidersfuturegenerations.Inthelongrunitmakesbettereconomicsenseaswell.Butitsmaingoalistocontributetoahealthierworld.Studiesconductedallovertheworldhaveshowntheeffectsthatconventionalchemicalfarminghasontheenvironment.Certainly，chemicalfertilizers，pesticides，andherbicidesincreasethequantityofafarm'sproduction.Theyhelpproducemoregrainsandvegetables.Butatwhatcost?ASwissstudyshowedthatorganicfarmingproducesanaverageof20%lessthanconventionalmethods.Buttheorganicallygrownfoodcontained50%lessfertilizerand97%lesspesticides.Thoughonlyapartoftheamountofpesticidesafarmusesactuallydoesthejobofkillingbugs，allofitremainsactiveinthesoilformonthsorevenyearsafterapplication.Perhapsworse，eachgenerationofpestsisgrowingincreasinglyimmune(免疫的)tothechemicalsused.It'snotevenallaboutthefoodandthesoil.Thepesticidesusedinconventionalagriculturearefinallyspillingtheirchemicalresidues(化学残留)intothewaterways.Itaffectswildlife，soilandecosystemsasawhole.AccordingtoaWorldwatchpaper，DeepTrouble:TheHiddenThreatofGroundwaterPollution，poisonouschemicalsarepollutinggroundwateroneveryinhabitedcontinent，endangeringtheworld'smostvaluablesuppliesoffreshwater.Perhapsnotsointuitive，organicfarmingaffectstheair.“Organicagriculturecanreducegreenhousegasemissionsbyeffectivelylockingmorecarbonintothesoilratherthanreleasingitintotheatmosphere，”found“FarmingSystemsTrial，”a15－yearstudy.Organicagricultureevenuses50%lessenergythanconventionalfarming.Howdoesorganicfarmingdealwithpests?Organicfarmersintentionallybuilduppopulationsofbeneficialinsects，suchasladybugs(瓢虫)，thateatotherpestsandcontrolthegrowthofinsects.Wildflowerscreategreenbeltsthatcontrolthespreadofweedsandthemselvesencouragethebeneficialinsects.Farmershavetosticktostrictstandardsandpracticestoearnthelabel“organic.”Lookingforward，bypromotingbiologicaldiversityandmaintainingsoilfertility，organicfarmingcreatesanaturalbalancethathelpstogethighqualityfoodinhealthyquantitiesyearafteryear.1．Whichofthefollowingcanbethebesttitleforthepassage?A．ThebestwaystosetuporganicfarmingB．WhyorganicfarmingbenefitstheenvironmentC．ThehistoryanddevelopmentoforganicfarmingD．Howtodealwithpestsandchemicalresidues答案B[主旨大意题。本文通过几个方面说明有机农业为什么会对环境有好处。文章第一段为主题段，下面各段都是围绕这一主题段进行说明的。]2．Itcanbeknownfromthepassagethat________．A．applicatingpesticideswillincreasethenumberofpestsB．organicfarmingproducesmoregreenhousegasemissionsC．conventionalfarmingisbetterthanorganicfarmingD．theorganicallygrownfooddoesgoodtopeople'shealth答案D[推理判断题。根据第二段最后一句Buttheorganicallygrownfoodcontained50%lessfertilizerand97%lesspesticides.可知，有机农产品含有的肥料少，含有的农药更少，由此可以推断，这种有机农产品对人的身体有益。]3．BywritingParagraph3，theauthormainlywantstotellus________．A．theimmunefunctionofpestsB．theeffectofchemicalresiduesC．thegreatharmofpesticidesD．thebenefitofconventionalagriculture答案C[作者意图猜测题。文章第三段说明应用农药不仅会使害虫产生免疫，而且还会污染水源，影响野生动物、土壤和生态系统。这一切都是应用农药所产生的巨大危害。故选C。]B体裁：记叙文话题：人物词数：305时间：6′At80yearsold，scientistJaneGoodallcontinuestoenjoyt...
