ReadingandThinking課文語法填空測試YuanLongping,______(know)asthe“fatherofhybridrice”,wasoneofChina’smostfamousscientists.Yet,heconsideredhimselfafarmerbecausehe_________(continue)workedthelandinhisresearch.Indeed,hisslimbutstrongbodywasjustlike______ofmillionsofChinesefarmers,to________hehaddevotedhislife.YuanLongpingwasborn____1930inBeijing.Hisparentswantedhimtopursueacareer____scienceormedicine.However,______concernedhimmostwasthatfarmersoftenhadpoorharvestsandsometimesevenhadaseriousshortageoffood______(eat).Totacklethiscrisis,hechosetostudyagricultureandreceivedaneducationatSouthwestAgriculturalCollegeinChongqing.knowncontinuallythatwhominwhatintoeatAftergraduatingin1953,heworked____aresearcher.YuanLongpingrealisedthatlargerfieldswerenotthesolution.Instead,farmersneededtoboostyieldsinthefieldstheyhad._____thiscouldbedonewasachallengingquestionatthetime.Yuan_________(convince)thattheanswercould______(find)inthecreationofhybridrice.Ahybridisacrossbetweentwoormorevarietiesofaspecies.Onecharacteristicofhybridsis_____theyusuallyattaina______(high)yieldthanconventionalcrops.However,_________itwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.Thecommonassumptionthenwas______itcouldnotbedone.Throughintenseeffort,Yuanovercameenormoustechnical________(difficult)todevelopthefirsthybridrice______couldbeusedforfarmingin1974.Thishybridenabledfarmers_________(expand)theiroutputgreatly.asHowwasconvincedfoundthathigherwhetherthatdifficultiesthattoexpandToday,it________(estimate)thatabout60percentofdomesticriceconsumptioninChinaiscomprisedofcrops_______(generate)fromYuan’shybridstrains,andhisstrainshaveallowedChina’sfarmerstoproducearound200milliontonsofriceperyear.Yuan’sinnovationhashelpedfeednotjustChina,_____manyothercountriesthatdependonriceaswell,suchasIndiaandVietnam.Becauseofhis________(value)contributions,YuanLongpingreceivednumerousawardsbothinChinaandabroad.______(give)thatYuan’shybridsmadehimquitewealthy,onemightthinkhewouldhaveretiredtoalifeofleisure.However,thisisfarfromthecase.Deepdown,Yuanwasstillvery______afarmeratheart._____amanofthesoil,hecaredlittleforcelebrityormoney.________,hemadelargedonations_________(support)agriculturalresearch._______impressedpeoplemostaboutYuanLongpingwashisongoingability_______(fulfil)hisdreams.Longago,heenvisionedriceplantsastall____sorghum,______eachearofriceasbigasabroom,andeachgrainofriceashugeasapeanut.Hesucceededin_______(produce)akindofrice______couldfeedmorepeopleathomeandabroad.Hislatervisionfor“seawaterrice”alsobecameareality,andpotentiallyopened_____nearlyonemillionsquarekilometresofsaltylandinChinaforriceproduction.Eveninhislateryears,YuanLongpingwasstillyoung_____heartandfullofvision,andeveryonewasalwaysexcitedtosee_______hewoulddreamupnext.ReadingForWritingChemicalpesticidesandartificialfertilisers_________(be)inwidespreadusein________(farm)sincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthem____agreatway________(fight)cropdiseaseandincreaseproduction.Overtime,________,whatsomescientistshavefoundis____theirlong-termusecansometimesharmboththeland_____people’shealth.havebeenashoweverthatandfarmingtofightForexample,pesticidescandamagethelandby______(kill)notonlyharmfulbacteriaandinsects,_______alsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecrops______(grow)onthelandand,inturn,theanimalsandhumans_____digestthem.Manypeopleworry___thesechemicalsmaymakethemillandevencausecancer.Infact,somepesticides_____DDThavebeen_________(prohibite)inmostcountriesbecauseofthedamagetheycause____peopleandtheenvironment.Asforchemicalfertilisers,crops______(grow)withthemusuallygrowtoofast_____(be)richinnutrition.Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan

_________(essence)minerals,andtheyoftenhave______(little)

flavouraswell.killingbutwholiketotobelessPara2grownthatprohibitedgrownessentialAs____alternative,somefarmershave________(switch)toorganicfarming,andmanycustomershaveturned_____organicfood_____theyshopatthelocalgrocery.Organicfarmingissimplyfarming_______usinganychemicals.Organicfarmersfocuson_______(keep)theirsoilrichandfree_____diseasethroughnaturalmeans.Forexample,manyorganicfarmersusenaturalwastefromanimals____fertiliser.Thismakesthesoilintheirfields_____(rich)inminerals.Italsokeepstheair,soil,water,____cropsfreeofchemicals.anwhenofaswithoutandPara3switchedtokeepingricherPara3Organicfarmersalsousemanyother________(method)toproducerichsoil.Theyoftenchangethekindofcrop______(grow)ineachfieldeveryyear.____instance,theymaygrowcorn___wheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrown____(be)becausetheyputimportantmineralsbackintotheground,_______(make)itreadyforthenextbatchofcrops.Organicfarmersalsoplantdiversecropsthatusedifferent_______(depth)ofsoiltohelpkeepitrich.Forexamplepeanutsgrow____theground’ssurface,butmanyothervegetablesputdowndeep_____(root).Thegoalofusingdifferentorganicfarmingmethods____(be)togrowgoodfoodwhileavoidingdamagetotheenvironmentor____people’shealth.methodsForo