题目内容：
Questionsarebasedonthefollowingpassage．
Acrosstherichworld,well-educatedpeopleincreasinglyworklongerthantheless-skilled．Some65%ofAmericanmenaged62-74withaprofessionaldegreeareintheworkforce,comparedwith32%ofmenwithonlyahigh-schoolcertificate．Thisgapispartofadeepeningdividebetweenthewell-educatedwell-offandtheunskilledpoor．Rapidtechnologicaladvancehasraisedtheincomesofthehighlyskilledwhilesqueezingthoseoftheunskilled．Theconsequences,forindividualsandsociety,areprofound．
Theworldisfacinganastonishingriseinthenumberofoldpeople,andtheywilllivelongerthaneverbefore．Overthenext20yearstheglobalpopulationofthoseaged65ormorewillalmostdouble,from600millionto1．1billion．Theexperienceofthe20thcentury,whengreaterlongevity(长寿)translatedintomoreyearsinretirementratherthanmoreyearsatwork,haspersuadedmanyobserversthatthisshiftwillleadtoslowereconomicgrowth,whiletheswellingranksofpensionerswillcreategovernmentbudgetproblems．
Butthenotionofasharpdivisionbetweentheworkingyoungandtheidleoldmissesanewtrend,thegrowinggapbetweentheskilledandtheunskilled．Employmentratesarefallingamongyoungerunskilledpeople,whereasolderskilledfolkareworkinglonger．ThedivideismostextremeinAmerica,wherewell-educatedbaby-boomers(二战后生育高峰期出生的美国人)areputtingoffretirementwhilemanyless-skilledyoungerpeoplehavedroppedoutoftheworkforce．
Policyispartlyresponsible．ManyEuropeangovernmentshaveabandonedpoliciesthatusedtoencouragepeopletoretireearly．Risinglifeexpectancy(预期寿命),combinedwiththereplacementofgenerousdefmed-benefitpensionplanswithlessgenerousdefined-contributionones,meansthateventhebetter-offmustworklongertohaveacomfortableretirement．Butthechangingnatureofworkalsoplaysabigrole．Payhasrisensharplyforthehighlyeducated,andthosepeoplecontinuetoreaprichrewardsintooldagebecausethesedaystheeducatedelderlyaremoreproductivethantheprecedinggeneration．Technologicalchangemaywellreinforcethatshift:theskillsthatcomplementcomputers,frommanagementknowhowtocreativity,donotnecessarilydeclinewithage．
Whatishappeningintheworkforceinrichcountries? A．Youngerpeoplearereplacingtheelderly．
B．Well-educatedpeopletendtoworklonger．
C．Unemploymentratesarerisingyearafteryear．
D．Peoplewithnocollegedegreedonoteasilyfindwork．
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