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1.2.A2018?Althoughtheworldishungry,itiseventhirstier.Whilenearly3/4oftheearthisc___56___withwater,weareshortofdrinkingwater.Thisisbecauseabout97%ofthewaterontheearthisseawater.Howcanwea___57___aseriouswatershortage?First,weshouldsavewaterandnotwasteit.Then,weshouldprotectourwaterresourcesandnotpollutethem.Lastly,weshoulddiscoverwaystoreusewater.Scientistshavegotsomeachievementsinthisfield.Butpeoplesneedforwaterisincreasingdaybyday.Wes___58___donthaveenoughwater.Whatelsecanwedo?Theseaseemstohavethebestanswer.Thereisp___59___ofwaterinthesea.Butweneedtotakethesaltawayfromtheseawater.Thisisveryexpensive.Ifscientistscanfindc___60___waystodoit,wecansolvetheproblemoftheshortageofwater.56.covered3/4becoveredwithcovered59.plentyplentyofplenty60.cheapercheaperB2018?TheBambooTrain,orNorryinthelocallanguage,isquitefamousinCambodia.Thetrainisinfactabigbamboobedwithfourwheelsandasmallengine.Itcanrunatthes___51___ofupto50km/honthetracks.Lotsofv___52___gotoCambodiatoenjoytheBambooTrainride.Theyhavetopay5dollarsperpersontog___53___onthetrain.Thebesttimetotakethetrainisfrom4to6oclockintheafternoon,b___54___itiscoolwhenpeopleenjoythecountrysideview.Itfeelsmorelikearollercoaster,butitsreallynice,aGermanytouristTheresaKessemeiersaidaftershec___55___aride.TheBambooTrainhasbecomeapopulartouristataction.51.speed50km/h50km/hspeed52.visitorsCambodiaenjoytheBambooTrainride.Theyhavetopay5dollarsLotsofvisitors53.get5getongetC2018?Howdoweknowthetime?Aclock,awatchoracellphonecanhelpus.Howevermanyyearsagotherewerenoclocksandknowingthetimewasnotsoeasy.Overthecenturiespeoplehavedevelopeddifferentw___56___oftellingthetime.About5,500yearsago,theEgyptiansi___57___thesunclock.Thiswasatallstonestructure.Itsshadow()showedthemovementofthes___58___theywereabletodeterminemidday.About3,500yearsago,theEgyptiansmadeasundial.Itwassmallerthanthesunclockandcouldmeasure()thetimeforhalfaday.Onc___59___daysoratnightitwasimpossibletotellthetimewithasunclockorasundial.Waterclockswerethef___60___clocksnottousethesun.Theideaissimple.Waterflowsfromonecontainertoanother.Whenthewaterreachesacertainl___61___itmovesalever()andthisshowsthehours.TheEgyptiansusedwaterclocksabout3,400yearsago.TheseclockswerepopularintheMiddleEastandChinabuttheyf___62___tokeepaccuratetime.Inthe13thcentury.themechanicalclockwasinvented.Thiswasmoreaccurate,b___63___wasexpensivetomake.Overthenextfewcenturiesitwasdeveloped.Forexample,springs()wereaddedaround1500.Thisi____64____accuracyandallowedclockstobesmaller.In1927,thefirstquartzclockwasdeveloped.Clocksbecamecheapertobuildandown.Peoplebegandependingonthemmoreandmoretorunbusinesses,marketsandsoon.Morerecently,in1956,camethedigitalclock.Andnowadayssatellitessendourcellphonesthetimetotheexactsecond.Therehasbeenalotofprogressintimekeepingbutsomethingsneverc___65___.Manofusstillhavetroublegettingoutofbedontimeandnotmissingappointments.56.waysAclock,awatchoracellphone,differentways57.inventedpeoplehavedevelopedinventabout5500yearsagoinvented58.sunthesunclocksun59.cloudysundialthesunclockcloudy.61.levelwaterclocklevel62.failedwaterclockbutfailtodofailed63.butbut64.improvedimproved65.changenowadayschangebutdevelopimprove104D2018?Wecantremember___61___(clear)sincewhenwestartedtotakeourmobilephonestoadinnertable.Thishappensalot,especiallywhenweeatout.Onced___62___come,wetakeoutourmobilephonesandtakephotosi____63____ofliftingourchopsticks.Later,wepostthephotosontoWeiboorWechat,____64____(wait)tobeliked.Thenwecheckedourmobilephonesfromtimetotimeduringthemeal,toseew____65____wegetlikedornot.Wejustcannotleaveourmobilephonesforsimplyameal.Doesthatsoundfamiliartoyou?Doyoudothatoften?Ifnot,howdoyoufeelwhenothersdothatwhenhavingdinnerwithyou?Arecentstudy_____66_____(suggest)thatwhatweareusedtodoingisnotthatgood.Spendingtimetakingphotosoffoodmakesthefoodlesspleasant.So,w____67____notstoptakingphotosandjustenjoythefoodaheadofyou?Besidesthe____68____(science)result,therearealsosomeotherbadinfluencesoftakingphotosoffoodbeforemeals.AfterpostingthephotosontotheInternet,onewillbeunabletocontrolhimselfandcheckhismobilephonemanytimes.Doeseveryoneacceptmyphotos?Ihopealotofpeoplelikethem!Itseemslikeyourmobilephonesecretlycallsyournameallthetime,evenwhenyouarew______69______realpeople.So,nexttimeyougoouttohavedinner,howaboutnottakingphotosoffood?Letthefoodbedeliciousasitisandshareyourlifewithothers.Trustme,anditwillbea____70____(wonder)time.61.clearlyrememberclearclearlyclearly62.dishesdishcomedishes63.insteadinsteadofinstead64.waitingwaiting65.whetherwhetherwhether66.suggestsArecentstudysuggests67.whyWhynotdowhy68.scientificsciencescientificscientific69.withwithwith1rememberclearclearlyclearly7WhynotdowhyE2018?Once,therewasalittlegreyplanet.Peoplelivingonithadntlookedafteritwell.A_____41_____theyhadexcellentinventionsandspaceshipsbeyondourimagination,theymadetheplanetf_____42______ofrubbishandpollution.Asaresult,therewerenoplantsora_____43_____left.Oneday,alittleboywaswalkingonthep____44____.Whenhepassedacave(),henoticedasmallredf_____45_____init.Theflowerwassickanda