题目内容：
Questionsarebasedonthefollowingpassage. Asmachinesgo,thecarisnotterriblynoisy,norterriblypolluting,norterriblydangerous;andonallthosedimensionsithasbecomebetterasthecenturyhasgrownolder.Themainproblemisitsprevalence,andthesocialcoststhatensuefromtheusebyeveryoneofsomethingthatwouldbefairlyharmlessif,say,onlytherichweretouseit.Itisapricewepayforequality.
Beforebecomingtoogloomy,itisworthrecallingwhythecarhasbeenarguablythemostsuccessfulandpopularproductofthewholeofthepast100years—andremainsso.Thestorybeginswiththeenvironmentalimprovementitbroughtinthe1900s.InNewYorkcityin1900,accordingtotheCarCulture,a1975bookbyJ.Flink,ahistorian,horsesdeposited2.5millionpoundsofmanure（粪）and60,000gallonsofurine（尿）everyday.Everyyear,thecityauthoritieshadtoremoveanaverageof15,000deadhorsesfromthestreets,itmadecarssmellofroses.
Carswerealsowonderfullyflexible.Themainearliersolutiontohorsepollutionandtrafficjamswastheelectrictrolleybus（电车）.Butthatrequiredfixedoverheadwires,andrailsandplatforms,whichwereexpensive,ugly,andinflexible.ThecarcouldgofromanyAtoanyB,andallowedtownstodevelopinalldirectionswithlow-densityhousing,ratherthanjustbeingconcentratedalongthetrolleyorraillines.Ruralareasbenefitedtoo,fortheybecamelessremote.
However,sincepollutionbecameaconcerninthe1950s,expertshavepredicted—wrongly—thatthecarboomwasabouttoend.InhisbookMr.&nbs
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