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1/4A（2018全国一卷）Accordingtoareviewofevidenceinamedicaljournal,runnerslivethreeyears61(long)thannon-runners.Youdon'thavetorunfastorforlong62(see)thebenefit.Youmaydrink,smoke,beoverweightandstillreduceyourriskof63(die)earlybyrunning.Whilerunningregatesalstlycann'tmakeyouliveforever,thereviewsaysit64(be)moreeffectiveatlengtheninglife65walking,cyclingorswimming.Twooftheauthorsofthereviewalsomadeastudypublishedin201466showedamerefiveto10minutesAdayofrunningreducedtheriskofheartdiseaseandearlydeathsfromall67(cause).Thebestexerciseisonethatyouenjoyandwilldo.Butotherwise…it'sprobablyrunning.Toavoidkneepain,youcanrunonsoftsurfaces,doexercisesto68(strength)yourlegmuscles(肌肉),avoidhillsandgetgoodrunningshoes.Runningischeap,easyandit'salways69(energy).Ifyouaretimepoor,youneedrunforonlyhalfthetimetogetthesamebenefitsasothersports,soperhapsweshouldallgive70atry.B（2018全国二卷）DietshavechangedinChina—andsotoohasitstopcrop.Since2011,thecountry61（grow）morecornthanrice.Cornproductionhasjumpednearly125percentover62past25years,whilericehasincreasedonly7percent.Atasteformeatis63(actual)behindthechange:Animportantpartofitscornisusedtofeedchickens,pigs,andcattle.Anotherreasonforcorn'srise:Thegovernmentencouragesfarmerstogrowcorninsteadofrice64(improve)waterquality.Cornuseslesswater65riceandcreateslessfertilizer(化肥)runoff.Thisswitchhasdecreased66(pollute)inthecountry'smajorlakesandreservoirsandmadedrinkingwatersaferforpeople.AccordingtotheWorldBank,Chinaaccountsforabout30percentoftotal67(globe)fertilizerconsumption.TheChineseMinistryofAgriculturefindsthatbetween2005—whenthegovernment68(start)asoil-testingprogram69givesspecificfertilizerrecommendationstofarmers-and2011,fertilizerusedroppedby7.7milliontons.Thatpreventedtheemission(排放)of51.8milliontonsofcarbondioxide.China'sapproachtoprotectingitsenvironmentwhile70(feed)itscitizensoffersusefullessonsforagricultureandfoodpolicymakersworldwide.saysthebank'sJuergenVoegele.C（2018全国三卷）I'mnotsure61ismorefrightened,meorthefemalegorilla(大猩猩)thatsuddenlyappearsoutofnowhere.I'mwalkingonapathintheforestintheCentralAfricanRepublic.Unexpectedly,I'mface-to-facewiththegorilla,whobeginsscreamingat62topofherlungs.Thatmakesherbabyscream,andthena400-poundmaleappears.Hescreamsthe63(loud)ofall.Thenoiseshakesthetreesasthemalebeatshischestandchargestowardme.Iquicklylowermyself,duckingmyheadtoavoid64(look)directlyintohiseyessohedoesn'tfeel65(challenge).2/4MynameisMireyaMayor.I'ma66(science)whostudiesanimalssuchasapesandmonkeys.Iwassearching67thesethreewesternlowlandgorillasI'dbeenobserving.Noonehadseenthemforhours,andmycolleaguesandIwereworried.WhenthegorillasandIfrightenedeachother,Iwasjustgladtofind68(they)alive.Truetogorilla'sunaggressivenature,thehugeanimal69(mean)norealharm.Hewasjustsaying:“I'mkingofthisforest,andhereisyourreminder!”Oncehismessagewasdelivered,heallowedme70(stay)andwatch.D（2017全国一卷）Therehasbeenarecenttrendinthefoodserviceindustrytowardlowerfatcontentandlesssalt.Thistrend,whichwasstartedbythemedicalcommunity（医学界）61amethodoffightingheartdisease,hashadsomeunintendedside62(effect)suchasoverweightandheartdisease—theverythingthemedicalcommunitywastryingtofight.Fatandsaltareveryimportantpartsofadiet.Theyarerequired63(process)thefoodthatweeat,torecoverfrominjuryandforseveralotherbodilyfunctions.Whenfatandsalt64(remove)fromfood,thefoodtastesasifismissingsomething.As65result,peoplewilleatmorefoodtotrytomakeupforthatsomethingmissing.Even66(bad),theamountoffastfoodthatpeopleeatgoesup.Fastfood67(be)fulloffatandsalt;by68(eat)morefastfoodpeoplewillgetmoresaltandfatthantheyneedintheirdiet.Havingenoughfatandsaltinyourmealswillreducetheurgetosnack(吃点心)betweenmealsandwillimprovethetasteofyourfood.However,be69(care)nottogotoextremes.Likeanything,itispossibletohavetoomuchofboth,70isnotgoodforthehealth.E（2017全国二卷）In1863,thefirstundergroundpassengerrailwayintheworldopenedinLondon.Itranforjustundersevenkilometersandallowedpeopletoavoidterrible__61__(crowd)ontheroadsaboveastheytravelledtoand___62__word.Ittookthreeyearstocompleteandwasbuiltusinganinterestingmethod.Thisincludeddigginguptheroad,____63___(lay)thetrackandthenbuildingastrongroofover___64___top.Whenallthosehadbeendone,theroadsurfacewasreplaced.Steamengines___65__(use)topullthecarriagesanditmusthavebeen___66__(fair)unpleasantforthepasssengers,withallthesmokeandnoise.However,therailwayquicklyprovedtobeagreatsuccessandwithinsixmonths,morethan25,000peoplewereusing___67__everyday.Later,engineers____68___(manage)toconstructrailwaysinasystemofdeeptunnels(隧道）,whichbecameknowntothetube.Thisdevelopmentwasonlypossiblewiththe___69___(introduce)ofelectric-poweredenginesandlifts.ThecentralLondonRailwaywasoneofthemost___70___(success)ofthesenewlines,andwasopenedin1900.Ithadwhite-paintedtunnelsandbrightredcarriages,andprovedextremelypopularwiththepublic.3/4F（2017全国三卷）Shelookslikeanyotherschoolgirl,fresh-facedandfulloflife.SarahThomasislookingforwardtochallengeofhernewA-levelcourse.Butunlikeschoolfriends,16-year-oldSarahisnotspendinghalf-term61(rest).Instead,sheisearning$6,