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TEXTAYou’veheard,nodoubt,abouttheplanet-friendlybenefitsofputtinggardensonrooftops,butwhataboutinstallingplantsonthesidesofbuildings?So-calledlivingwallscanmakeforstunningworksofbotanicalart,can’t-miss-themsignsofenvironmentalstewardship.Butdoesthisarchitecturaltrendactuallyhelpcutdownonbuildings’energyuse?Theanswerdependsonthegardens,whicharesproutingupworldwide,everywherefrommuseumsandcorporateheadquarterstoairportsandhighwayoverpasses.Andthenewdesignskeepgrowinglarger.Whendoneright,alivingwallcansignificantlyreduceabuilding’sheatingandcoolingcosts,thoughnotasmuchasagreenroofcan.Thewalltreatments—whichconsistofabunchofmodularmetalorplasticcasingsthatcanberemovedforinspectionsorrepairs—alsocostmore,easilyclimbingover$100persq.ft.,comparedwith$15to$40persq.ft.forgreenroofs.Andsinceraingenerallydoesn’tfallsideways,irrigationisbothnecessaryandtricky.Designershavetousedrip-irrigationsystemsandoftenrelyonelectronicmonitoringdevicestomakesuretheplantsdon’tdryout.Irrigatingwithrecycledwaterandinstallingnativeplantscanhelpcutdownonresourceuse.GeorgeIrwin,CEOofGreenLivingTechnologiesadmitsthatclientsaren’thanginglivingwallsfortheenergy-costsavings.“Greenroofsprovideafasterreturnontheinvestment,”hesays.“Buteverybodycanseeyourgreenwall.Itismarketinggenius.”MinsukCho,anarchitectwhodressedtheouterandinnerwallsofSeoul’sAnnDemeulemeesterstoreinadensecarpetoffoliage,saysgreeningwallsmaximizestheopportunitytocreateabetterurbanenvironment,butyoucan’tplantthemandwalkaway.“Justlikeanygarden,maintainingagreenwalltakescommitment,”Chosays.“Itshouldn’tbeconsideredasabuildingmaterialbutmorelikeapet.”Averylargeandthirstyone.1.Atthebeginningofthepassage,theauthorintendsto_____.A.arousereaders’interestinenvironmentalstewardshipB.informreadersthatagreenroofhelpscutdownonbuildings’energyuseC.leadontothediscussionofadvantagesanddisadvantagesofthelivingwallD.describethecurrentstatusofarchitecturaltrend2.Theword“stewardship”inParagraph1isclosestinmeaningto______.A.pollutionB.supervisionC.protectionD.damage3.Accordingtothepassage,whichofthefollowingwillhelptocutdowntheenergy-cost?A.Utilizingremovablemodularmetalorplasticcasings.B.Utilizingdrip-irrigationsystems.C.Adoptingelectronicmonitoringdevices.D.Usingrecycledwater.4.Welearnfromthepassagethatcomparedwithagreenwall,agreenroof_____.A.providesaslowerreturnontheinvestmentB.canbemoreeffectiveinreducingabuilding’sheatingandcoolingcostsC.costsmuchmoreD.ismoredifficulttobeinstalled5.Whichofthefollowingstatementsistrue?A.Sincelivingwallsaremoreexpensive,greenroofsaremorepopular.B.Becauseoftheenergy-costsavings,manycorporateheadquartersarehanginggreenwalls.C.Theonlyadvantageofagreenwallisthatitcouldcreateabetterurbanenvironment.D.Agreenwalldemandsextracareandconcern,justlikeapet.TEXTBBecauseIamextremelyvulnerabletobothslickadvertisingandpeerpressure,I’vebeenthinkingaboutgettinganiPad.Buthere’stheproblem:I’mcheap,andtheiPad’snot.IfI’mgoingtoforkoveratleast$499foranewdevice,Iwanttotryitoutandmakesureit’snotjustalarger,shinierversionofmyiPhone.ButifIwenttomylocalAppleStore,I’dgettospendonlyafewminutestestingoutthemachine.Iwantedmoretimethanthat,soIrentedonefor$15adayfromaguyonSnapGoods.TheInternetstart-upinBrooklynrunsonasimplepremise:therearepeoplewhowanttoborrowstuff—campingequipment,foodprocessors,robotvacuums,etc.—andtherearepeoplewhohavestufftheywanttolend.SnapGoodshelpsthesetwogroupsconnectovertheWeb.SnapGoodsisoneofmanysitesthathavesprunguptofacilitateofflinesharing.Somesiteshaveanarrow,obviousfocus(likeSwapBabyGoods.com)whileothersaremoreobscure(NeighborhoodFruithelpspeoplesharewhat’sgrowingintheiryardsorfindfruittreesonpublicland).Butregardlessofwhetherthesharingisfreeorinvolvesafee,thesetransactionsoftencomewithastick-it-to-the-manattitude.“Borrowthesethingsfromyourneighbors,”readsoneexhortationonneighborrow.com“Theowner-shiphasSAILED!”Allofthesesitesareencouragingsomethingacademicscallcollaborativeconsumption—inotherwords,peer-to-peersharingorrenting.Rentingsomethingyoudon’tneedtouseveryoftenmakesalotmoresensethanbuyingitandlettingitcollectdustinyourgarage.There’sagreenaspectaswell,sincesharinghelpscutdownonoveralluseofresources.Butoneofcollaborativeconsumption’smostsurprisingbenefitsturnsouttobesocial.Inanerawhenfamiliesarescatteredaroundthecountryandwemaynotknowthepeopledownthestreetfromus,sharingthings—evenwithstrangerswe’vejustmetonline—allowsustomakemeaningfulconnections.“Thisisn’tjustaboutsavingtheenvironmentorsavingabuck,”saysSnapGoodsCEORonWilliams,whocameupwiththeideaafterrentingastranger’smotorcycleviaCraigslist.“Thisisaboutsavingyourselfbymakinginformedconsumerdecisions.”I’mnotsureifIgotajoltofoxytocinwhenIborrowedGoodwin’siPad,butitdidfeelgoodtomakeaconnection.Intheend,though,IdecidednottopurchaseaniPad.Sorry,SteveJobs.I’mjustnotthatintoowningthingsanymore.6.TheauthorrentedaniPadinsteadofbuyingitbecauseofthefollowingreasonsEXCEPTthat_____.A.theiPadisexpensiveandtheauthorwantstomakesureaniPadisworthyB.hehasalreadygotaniPhoneandexpectstotestthebetterqualityofaniPadC.thelocalApp