[单选]  二、阅读理解：选择题（每题10分）Mostcoupleswhogetmarriedordecidetolivetogethergenerallyplantohavechildren.Severalyearsago,peoplethoughtthathavingbigfamilieswascommonandthiswasseenasanadvantage.Thatwasmainlybecausechildrenbeganworkingatanearlyagetohelpprovideforthefamily.Butwiththechangingtimesandwiththecostoflivinggettinghighereverysingleyear,havingabigfamilyisnolongerconsideredtobeapracticaloption.Infact,morecouplesconsiderthattheyhaveonlyonechildandsomedonothaveanydesiretobecomeparentsatall.AccordingtotheAustralianInstituteofFamilyStudies,by1986,womenaged40to44years,wereconsiderablymorelikelytohavegivenbirthtotwochildrenthanthreechildren(36%vs.27%)orfourormorechildren(19%).However,takentogether,womenwerestillmorelikelytohavehadthreeormorechildrenthantohavehadtwochildren(46%vs.36%).Inrecentyears,womenweremorelikelytohavehadtwochildrenthanthreeormorechildren–atrendthatwasmostmarkedinthemostrecentperiod(38%vs.25%in1996;38%vs.22%in2006).Thesedays,mostfamiliesinAustraliahavetwochildren.Butthenumberofwomenwhohadgivenbirthtoasinglechildincreasedprogressivelyfromonly8%in1981to13%in2006.TheU.S.CensusBureaustatesthatthereareapproximately14milliononlychildreninAmericatoday.Thiscomprises20%ofthechildren'spopulationcomparedtoonly10%aroundfiftyyearsago.Severalyearsago,peoplethoughtthathavingbigfamilieswasA.uncommonandthiswasseenasanadvantageB.commonandthiswasseenasadisadvantageC.commonandthiswasseenasanadvantage2.By1986,takentogether,womenwerestillmorelikelytohavehadchildren.A.lessB.moreC.no3.Inrecentyears,womenweremorelikelytohavehad.A.threeorfourchildrenB.morechildrenC.fewerchildren4.Accordingtothepassage,wecanpredictthatthenumberoffamilywithasinglechildwill(将会增长).A.decreasedramaticallyB.increasedramaticallyC.remainsteady5.Whichofthefollowingmaybethebesttitleforthepassage?A.FamiliesHavingFewerChildrenNowadays.B.CouplesHavingMoreChildrenNowadays.C.WomenBeingLikelytoHaveMoreChildren.