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1、2010年6月大学英语四级真题Questions47to56arebasedonthefollowingpassage.Whenwethinkofgreenbuildings,wetendtothinkofnewones–thekindofhigh-tech,solar-paneledmasterpiecesthatmakethecoversofarchitecturemagazines.ButtheU.S.hasmorethan100millionexistinghomes,anditwouldbe47.G）incrediblywastefultotearthe
2、malldownand48.K）replacethemwithgreenerversions.Anenormousamountofenergyandresourceswentintotheconstructionofthosehouses.Anditwouldtakeanaverageof65yearsforthe49.J）reducedcarbonemissionsfromanewenergy-efficienthometomakeupfortheresourceslostbydestroyinganoldone.Sointhebroadest50.L）sens
3、e,thegreenesthomeistheonethathasalreadybeenbuilt.Butatthesametime,nearlyhalfofU.S.carbonemissionscomefromheating,coolingand51.H）poweringourhomes,officesandotherbuildings."Youcan'tdealwithclimatechangewithoutdealingwithexistingbuildings,"saysRichardMoe,thepresidentoftheNationalTrust.Wi
4、thsome52.D）exceptions,theoldesthomestendtobetheleastenergy-efficient.Housesbuiltbefore1939useabout50%moreenergypersquarefootthanthosebuiltafter2000,mainlyduetothetinycracksandgapsthat53.E）expandovertimeandletinmoreoutsideair.Fortunately,therearea54.O）vastnumberofrelativelysimplechange
5、sthatcangreenolderhomes,from55.F）historiconeslikeLincoln'sCottagetoyourownpostwarhome.Andefficiencyupgrades(升级)cansavemorethanjusttheearth;theycanhelp56.I）protectpropertyownersfromrisingpowercosts.注意：此部分试题请在答题卡2上作答。A)accommodationsB)clumsyC)doubtfulD)exceptionsE)expandF)historicG)incr
6、ediblyH)poweringI)protectJ)reducedK)replaceL)senseM)shiftedN)supplyingO)vast2011年6月大学英语四级真题Questions47to56arebasedonthefollowingpassage.Thepopularnotionthatolderpeopleneedlesssleepthanyoungeradultsisamyth,scientistssaidyesterday.Whileelderlypeople47N）tendtosleepforfewerhoursthantheydi
7、dwhentheywereyounger,thishasa(n)48L）negativeeffectontheirbrain'sperformanceandtheywouldbenefitfromgettingmore,accordingtoresearch.SeanDrummond,a.psychiatrist(心理医生)attheUniversityofCalifornia,SanDiego,saidolderpeoplearemorelikelytosufferfrombrokensleep,whileyoungerpeoplearebetteratslee
8、ping4
