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11.(2018I)1Accordingtoareviewofevidenceinamedicaljournal,runnerslivethreeyears61(long)thannon-runners.Youdonthavetorunfastorforlong62(see)thebenefit.Youmaydrink,smoke,beoverweightandstillreduceyourriskof63________(die)earlybyrunning.Whilerunningregularlycantmakeyouliveforever,thereviewsaysit64(be)moreeffectiveatlengtheninglife65walking,cyclingorswimming.Twooftheauthorsofthereviewalsomadeastudypublishedin201466showedamerefiveto10minutesadayofrunningreducedtheriskofheartdiseaseandearlydeathsfromall67(cause).Thebestexerciseisonethatyouenjoyandwilldo.Butotherwise...itsprobablyrunning.Toavoidkneepain,youcanrunonsoftsurfaces,doexercisesto68(strength)yourlegmuscles()avoidhillsandgetgoodrunningshoes.Runningischeap,easyanditsalways69(energy).Ifyouaretimepoor,youneedrunforonlyhalfthetimetogetthesamebenefitsasothersports,soperhapsweshouldallgive70atry.2.(2018II),1Dietshavechangedinchina-andsotoohasitstopcrop.Since2011,thecountry61____(grow)morecornthanriceCornproductionhasjumpednearly125percentover__62__past25years,whilericehasincreasedonly7percent.Atasteformeatis63_____(actual)behindthechange:Animportantpartofitscornisusedtofeedchickens,pigs,andcattle.Anotherreasonforcorn'srise:Thegovernmentencouragesfarmerstogrowcorninsteadofrice64_________(improve)waterquality.Cornuseslesswater_65_____riceandcreateslessfertilizer()runoff.Thisswitchhasdecreased66________(pollute)inthecountry'smajorlakesandreservoirsandmadedrinkingwatersaferforpeople.AccordingtotheWorldBank,Chinaaccountsforabout30percentoftotal67______(globe)fertilizerconsumption.TheChineseMinistryofAgriculturefindsthatbetween2005-whenthegovernment68______(start)asoil-testingprogram69_________givesspecificfertilizerrecommendationstofarmers-and2011,fertilizerusedroppedby7.7milliontons.Thatpreventedtheemission()of51.8milliontonsofcarbondioxide.China'sapproachtoprotectingitsenvironmentwhile70_____(feed)itscitizensoffersusefullessonsforagricultureandfoodpolicymakersworldwide,saysthebank'sJuergenVoegele.3.(2018III)1I'mnotsure61ismorefrightened,meorthefemalegorilla()thatsuddenlyappearsoutofnowhere.I'mwalkingonapathintheforestintheCentralAfricanRepublic.Unexpectedly,I'mface-to-facewiththegorilla,whobeginsscreamingat62topofherlungs.Thatmakesherbabyscream,andthena400-poundmaleappears.Hescreamsthe63(loud)ofall.Thenoiseshakesthetreesasthemalebeatshischestandchargestowardme.Iquicklylowermyself,duckingmyheadtoavoid64(look)directlyintohiseyessohedoesn'tfeel65(challenge).MynameisMireyaMayor.I'ma66(science)whostudiesanimalssuchasapesandmonkeys.Iwassearching67thesethreewesternlowlandgorillasI'dbeenobserving.Noonehadseenthemforhours,andmycolleaguesandIwereworried.WhenthegorillasandIfrightenedeachother,Iwasjustgladtofind68(they)alive.Truetogorilla'sunaggressivenature,thehugeanimal69(mean)norealharm.Hewasjustsaying:I'mkingofthisforest,andhereisyourreminder!Oncehismessagewasdelivered,heallowedme270(stay)andwatch.4.20171Therehasbeenarecenttrendinthefoodserviceindustrytowardlowerfatcontentandlesssalt.Thistrend,whichwasstartedbythemedicalcommunity61amethodoffightingheartdisease,hashadsomeunintendedside62(effect)suchasoverweightandheartdiseasetheverythingthemedicalcommunitywastryingtofight.Fatandsaltareveryimportantpartsofadiet.Theyarerequired63(process)thefoodthatweeat,torecoverfrominjuryandforseveralotherbodilyfunctions.Whenfatandsalt64(remove)fromfood,thefoodtastesasifismissingsomething.As65result,peoplewilleatmorefoodtotrytomakeupforthatsomethingmissing.Even66(bad),theamountoffastfoodthatpeopleeatgoesup.Fastfood67(be)fulloffatandsalt;by68(eat)morefastfoodpeoplewillgetmoresaltandfatthantheyneedintheirdiet.Havingenoughfatandsaltinyourmealswillreducetheurgetosnack()betweenmealsandwillimprovethetasteofyourfood.However,be69(care)nottogotoextremes.Likeanything,itispossibletohavetoomuchofboth,70isnotgoodforthehealth.5.20171In1863thefirstundergroundpassengerrailwayintheworldopenedinLondon.Itranforjustundersevenkilometersandallowedpeopletoavoidterrible__61__(crowd)ontheroadsaboveastheytravelledtoand__________62__work.Ittookthreeyearstocompleteandwasbuiltusinganinterestingmethod.Thisincludeddigginguptheroad,____63___(lay)thetrackandthenbuildingastrongroofover___64___top.Whenallthosehadbeendone,theroadsurfacewasreplaced.Steamengines___65__(use)topullthecarriagesanditmusthavebeen___66__(fair)unpleasantforthepassengers,withallthesmokeandnoise.However,therailwayquicklyprovedtobeagreatsuccessandwithinsixmonths,morethan25,000peoplewereusing___67__everyday.Later,engineers____68___(manage)toconstructrailwaysinasystemofdeeptunnels(,whichbecameknowntothetube.Thisdevelopmentwasonlypossiblewiththe___69___(introduce)ofelectric-poweredenginesandlifts.ThecentralLondonRailwaywasoneofthemost___70___(success)ofthesenewlines,andwasopenedin1900.Ithadwhite-paintedtunnelsandbrightredcarriages,andprovedextremelypopularwiththepublic.6.20171Shelookslikeanyotherschoolgirl,fresh-facedandfulloflife.SarahThomasislookingforwardtochallengeofhernewA-levelcourse.Butunlikeschoolfriends,16-year-oldSarahisnotspendinghalf-term61_____