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GETCloze2012/6“Abetter,richerandhappierlifeforallourcitizens.”That'stheAmerican41.Inpractice,itmeanslivinginaspacious,air-conditionedhouse,owningacarorthreeandmaybeaboatoraholidayhome,nottomentionflyingoffto42destinations.Thetrouble43thislifestyleisthatitconsumesalotofpower.IfeveryoneintheworldstartedlivinglikewealthyAmericans,we44needtogeneratemorethan10times45energyeachyear.And46,inacenturyorthree,weallexpecttobe47byanarmyofrobotsandzoomupintospaceonholidays,wearegoingtoneedavastamountmore.Wherearewegoingtogetsomuchpowerfrom?Itisclearthatcontinuingtorelyon48fuelswillhavecatastrophicresults,becauseofthedramaticwarmingeffectofcarbondioxide.Butalternativepowersourceswillaffecttheclimatetoo.Fornow,theclimaticeffectsofcleanenergysourcesaretrivial49thosethatspewoutgreenhousegases,butifwekeeponusingevermorepoweroverthecomingcenturies,theywillbecomeevermore50.41.A.constitutionB.dreamC.historyD.character42.A.exoticB.patrioticC.supersonicD.alcoholic43.A.onB.forC.atD.with44.A.shallB.willC.shouldD.would45.A.muchmoreB.morethanC.asmuchD.ofmore46.A.ifB.thoughC.whileD.so47.A.takentoB.attendedtoC.attachedtoD.submittedto48.A.rockB.stoneC.fossilD.diamond49.A.accordingtoB.basedonC.suchasD.comparedwith50.A.signifiedB.imperativeC.indispensableD.negligible2012/12E-commercehasrevolutionizedthewaybusinessisdoneintoday’smarket.However,customersareat41ofpurchasingfalseproductsorpoorqualityitems.Many42thedistancebetweencustomersandsendthewronggoodsandlureclientstobuygoodsrecommendedasgreat43,butwhencustomersreceivetheseitems,theyfindthemselvesfallingintotraps.Manydangers,44bytheobscurityofe-commerce,involvetheproductsandtheelectronictransaction.Fromthebuyer’s45,dangersincludepurchasingproductsnotmeasuring46whatwaspreviousadvertisedinthewebsite.Anotherriskisidentitytheft.Sinceelectronictransactionsareneededtocompletethepurchase,hackersmayacquire47informationabouttheusertomakeotherpurchases.Therearestillhonestbusinessthatselltheirproductsandservicesbutgainaverysmallprofitby48thepricesoftheirproductsbecausetheyhavealotofcompetitionintheInternet.Thatis49oneofthehazardsofe-commercethatshouldbeconsideredisthebankruptcyofbusinesssinceprofitislowoftheyneed50theirgoodsascheaplyaspossible.41.A.timeB.randomC.sightD.risk42.A.takeadvantageofB.castdoubtonC.giverisetoD.goaheadwith43.A.deceptionsB.bargainsC.opportunitiesD.advertisements44.A.managedB.createdC.preventedD.led45.A.prospectB.aspectC.respectD.perspective46.A.astoB.priortoC.uptoD.nextto47.A.confidentialB.superficialC.potentialD.initial48.A.raisingB.disqualifyingC.exaggeratingD.minimizing49.A.howB.becauseC.whyD.where50.A.sellingB.tosellC.sellD.sold2013/6Therearetwoprimarycausesoftrafficaccidents,thosethatarecausedbythedriverandthosethatareenvironmentalandoutsidethedriver’scontrol.41environmentalissueslikeweatherorpoorroadmaintenancemaycauseanaccident,statisticallythesearefarlesslikelytodoso.Driverdistractionsprovetobethemaincauseofaccidents.Themost42distractionsarelookingattraffic,crashesandroadsideincidents.Whileitiswidelybelievedthatcellphonesareagreatercause,cellphonesonly43sixthonthelist.44,lawstolimitcellphoneusewhiledrivingdonotdecreaseaccidents.Hands-freephonesare45thanhand-helddevices.Alcoholwasafactorinatleast41percentofallfatalcrashes.Alcohol46affectsvision,reactiontimeandattentionofthedriver,anddecreasesoveralldrivingperformance.Fatigue47100,000vehiclecrashesperyear,killing481,500peopleandinjuring71,000people.Accidentscausedbyfatigueareparticularly49fortruckdriversandages15to20whowere50afatalcrashin2005,37percentwerespeedingatthetimeofthecrash.41.A.BecauseB.IfC.WhileD.However42.A.disruptiveB.constructiveC.instructiveD.descriptive43.A.comeacrossB.comeonC.comeaboutD.comein44.A.EvensoB.InfactC.BycontrastD.Forexample45.A.nolongersafeB.notsosafeC.moresaferD.nomoresafe46.A.adverselyB.favorablyC.scarcelyD.affectionately47.A.standsforB.runsforC.accountsforD.compensatesfor48.A.asmuchasB.aslongasC.assoonasD.asmanyas49.A.rareB.prevalentC.populousD.necessary50.A.lostinB.situatedinC.involvedinD.indulgedin2013/12Asasociety,we’relivinglongerandbetterthanatanytimeinhistory.Inpart,thisisdueto1advances.Deathratesaredown,life41ishigherthanever,andwe'remakingprogress42themostseriousdiseasesweface.Asweconsiderthedirectionhealthcarewill43inthefuture,onethingiscertain:new,innovativemedicineswillassumeanincreasingly44roleinthewayweimprovethequalityofcareforfuturegenerations.One45roleofnewmedicineswillbetheprevention,treatment,andmanagementofmanydiseasessufferedbytheagingBabyBoomergeneration.Intheyear2000，therewere4635.6millionAmericansaged65andolder.By2030,thisnumberis47todoubletoanestimated71.5million.Diseaselikediabetesrepresentagrowingthreat,48topatientsbuttoourabilitytokeephealthcareaffordable.Wehavetodobetterinourlifestylesandinourhealthcaresystemto49anenormousdiseaseburdenandeconomicburdenontheboomerthemselves,theirfamilies,employers,andfederalandstategovernments.Mewdrugsareavitalpartofthesolutiontothisrapidly50issue.41.A.expressionB.expectancyC.explorationD.exploitation42.A.againstB.forC.without