单项选择题
PassageOne
Questions21to25arebasedonthefollowingpassage.
Formanyyears，T-shirtsweresimpleshort-sleevedundershirtsformenandboys.T-shirtsusedtobeofonecolor－white.Andsincetheywerewornundershirts，theyweregenerallynotseen.
TodaytheT-shirthasbecomefashionable.Itcanbeseeneverywhereandoneveryone.WomenandlittlechildrenwearT-shirtsasdoteenagers，universitystudents，andmenfromallwalksoflife（各行各业）。T-shirtsarewornonplayground，atthebeachorintown.Theycanalsobewornforwork.YetT-shirtsremainrelativelyinexpensiveandlongwearing，aswellaseasytocarefor.Smartbutcomfortableandconvenienttowear，theyhavebecomeoneofAmerican‘snewestideasonfashion.
AlthoughT-shirtsarenowavailableinawidevarietyofbrightmaterialsandstyles，themostpopularkindisthetraditionalcottonT-shirtswithasloganorpictureprintedonthefront.AT-shirtmaybearapicture，asingleword，apopular phrase，oranadvertisement.AsT-shirtsarebecomingmoreandmorepopular，newdesignsarecomingupallthetime.
Wecanlearnfromthesecondparagraphthat__________.
A．T-shirts are worn by little children rather than by teenagers
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