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UNIT2APIONEERFORALLPEOPLEAlthoughheisoneofChina'smostfamous1___________(scientist),YuanLongpingconsidershimselfafarmer,forheworksthelandtodohisresearch.Indeed,hissunburntfaceandarmsandhisslim,strongbodyarejustlikethoseofmillionsofChinesefarmers,forwhomhe2____________(struggle)forthepastfivedecades.DrYuanLongpinggrows3_________iscalledsuperhybridrice.In1974,hebecamethefirstagriculturalpioneerintheworld4____________(grow)ricethathasahighoutput.Thisspecialstrainofricemakes5_______possibletoproduceone-thirdmoreofthecropinthesamefields.Nowmorethan60%oftherice6__________(produce)inChinaeachyearisfromthishybridstrain.7__________(bear)intoapoorfarmer'sfamilyin1930,DrYuangraduated8________SouthwestAgriculturalCollegein1953.Sincethen,findingwaystogrowmorerice9___________(be)hislifegoal.Asayoungman,hesawthegreatneedforincreasingthericeoutput.Atthattime,hungerwasa10__________(disturb)probleminmanypartsofthecountryside.DrYuansearchedforawaytoincreasericeharvestswithout11__________(expand)theareaofthefields.In1950,Chinesefarmerscouldproduceonlyfiftymilliontonsofrice.Inarecentharvest,however,nearlytwohundredmilliontonsofricewasproduced.Theseincreasedharvestsmeanthat22%oftheworld'speoplearefedfromjust7%ofthefarmlandinChina.DrYuanisnowcirculatinghisknowledgeinIndia,Vietnamandmanyotherless12____________(develop)countriestoincreasetheirriceharvests.Thankstohisresearch,theUNhasmoretoolsinthebattletoridtheworld13_______hunger.Usinghishybridrice,farmersareproducingharveststwiceaslargeasbefore.DrYuanisquite14__________(satisfy)withhislife.However,hedoesn'tcareaboutbeingfamous.Hefeelsitgiveshimless15___________(free)todohisresearch.Hewouldmuchrather16____________(keep)timeforhishobbies.Heenjoyslisteningtoviolinmusic,17____________(play)mah-jong,swimmingandreading.Spendingmoneyonhimselforleadingacomfortablelifealso18______(mean)verylittletohim.Indeed,hebelievesthatapersonwithtoomuchmoneyhasmoreratherthanfewer19____________(trouble).Hethereforegivesmillionsofyuantoequipothers20_______theirresearchinagriculture.Justdreamingforthings,however,21________(cost)nothing.LongagoDryuanhadadreamaboutriceplantsastallassorghum.Eachearofricewasasbigasanearofcornandeachgrainofricewasashugeasapeanut.DrYuan22_____(awake)fromhisdreamwiththehopeofproducingakindofrice23________couldfeedmorepeople.Now,manyyearslater,DrYuanhasanotherdream:toexporthisricesothatitcanbegrownaroundthe24__________(global.)Onedreamisnotalwaysenough,especiallyforaperson25__________lovesandcaresforhispeopleCHEMICALORORGANICFARMING?Overthepasthalfcentury,1_______(use)chemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomedthemasagreatway2__________(stop)cropdiseaseandincreaseproduction.Recently,3__________,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamage4_____thelandand,evenmoredangerous,topeople's5____________(healthy).Whataresomeoftheproblemscausedbychemicalfertilizers?First,theydamagethelandbykillingthe6_________(help)bacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupply7____________(逐渐累积)inpeople'sbodiesovertime.Manyofthesechemicalscan8____________（导致）cancerorotherillnesses.Inaddition,fruit,vegetablesandotherfood9_________（grow）withchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.Theymaylookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals.Withthese10__________(discovery),somefarmersandmanycustomersarebeginningtoturnto11____________(organ)farming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocuson12________(keep)theirsoilrichandfreeofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrow13__________(strength)andhealthy.Organicfarmers,therefore,oftenprefer14_________(use)naturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree15__________chemicals.Organicfarmersalsousemanyothermethodstokeepthesoil16_________(fertilizer).Theyoftenchangethekindofcropineachfield17_____________________(每隔几年),forexample,growingcornorwheatandthenthenextyearpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,18___________(make)itreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground'ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfrom19__________（carry）awaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear'scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowgoodfoodandavoid20_________(damage)theenvironmentorpeople'shealth.