2017年12月英語(yǔ)四級(jí)閱讀模擬練習(xí)題及答案task1?Thefuturepopulationwillbeolderthantoday,andthisinturnwillchangethepatternsofsocialdemands.However,Mexicowillstillbefarfromtheagingsocietiesthatwillmostlikelyprevail(占優(yōu)勢(shì))intheindustrializedcountries.Inlessthan25years,thecountrywillhavetoaddalmostasmuchinfrastructureasithasalreadybuiltuptonow,simplytomaintainservicesandproductionatthecurrentlevels.Thiswillbeatremendouschallenge,althoughasimilaronewasfacedsuccessfullyintherecentpast,whenavailableinfrastructurewasdoubledintwodecadesorso.ItisnowonderthatmuchhasbeensaidabouttheneedtoreduceorpreferablyhaltMexico'spopulationcontrolwhichistakenforgrantedasbothgoodandnecessary.Ithasalsogainedsupportersinthedevelopingworld,andMexicoisnoexception.Buttheargumentsaboutpopulationarecomplicated,asthefollowingdiscussionillustrates.?EvenifMexico'spopulationreaches125millionbytheyear2010,itspopulationdensityisstillsmallerthanthe1985populationdensityofsome50countries.ByinternationalstandardsMexicowillstillnotbeoverpopulatedbytheyear2010.Ifwealthisgeneratedbypeople,themoreindividualsthereare,thegreaterthewealththatpotentiallycouldbegenerated.WhyshouldMexicocontrolitspopulationatdensitylevelsbelowthoseoftherichercountriesifmorepopulationrepresentsthepossibilityofgeneratingmorewealth??Ontheotherhand,itisoftenpointedoutthatoncesustainability(支撐力)limitsarenearorarereached,therearedecreasingproductivitygains(or,perhapsmoreaccurately,increasingproductivelosses),andpeoplebecomeacostratherthananasset.Ifweassumethattherearesustainabilitylimitsandthatweareclosetoreachingtheselimitsataworldlevel,thenitisappropriatetocheckpopulationgrowth.?21.Accordingtothepassage,thepopulationargumentisfocusedon_______.?A.whethermorepeopleareapropertyoracost?B.whetherMexicoshouldcontrolitspopulationgrowthornot?C.whetherthedensityofpopulationinMexicoislargeorsmall?D.whatthestandardinternationalsustainabilitylimitis?22.WhichofthefollowingisTRUEaccordingtothefirstparagraph??A.Mexicohassteppedintoanagingsociety.?B.ItisnotnecessaryforMexicotocontrolitspopulation.?C.Mexicopopulationisyoungerthanthatofdevelopedcountries.?D.ItisnotnecessaryforMexicotodevelopitsinfrastructure.?23.Byinfrastructure(Para.2)theauthormeans_______.?A.buildings?B.thebasicframeworkofacountry,suchasschools,services,etc.?C.socialdemands?D.servicesandproduction?24.Itmaybeinferredfromthe3rdparagraphthat_______.?A.itisn'tnecessaryforMexicotocontrolitspopulationgrowth?B.populationislikelytogrowataslowerpacethaninthepast?C.themorepeoplethereare,thegreaterthewealthpeoplecouldgenerate?D.Mexicoshouldcontrolitspopulationgrowthbecauseshebelongstothedevelopingcountries?25.Tocheckpopulationgrowthisnecessarywhen_______.?A.therearedecreasingproductivitygains?B.thereareincreasingproductivitylosses?C.weareclosetoreac