Youcanprobablyallrideabikewell．I'manexception（例外）．IstartedridingabikewhenIwas3yearsold．Itwasatinytoybikewithfourwheels．Iloveditverymuchandrodeiteveryday．WhenIwas5，mycousingavemeapinkbik

　　Youcanprobablyallrideabikewell．I'manexception （例外）．

　　IstartedridingabikewhenIwas3yearsold．Itwasatinytoybikewithfourwheels．Iloveditverymuchandrodeiteveryday．

　　WhenIwas5，mycousingavemeapinkbike．Itwasatruebicyclewithjusttwowheels!Atthetime，myparentsweretoobusytoteachmehowtorideit．SoIhadtolearntoridebymyself．Ipracticedhardonweekendsandduringvacations，althoughIstilldidn'tknowhowtomaketurns．

　　Onesummervacation，Iborrowedanoldbikeandrodeitwithmyfriendsonacountryroad．Wesangandpracticedourridingskills．Suddenly，asmallboyranintotheroad．Iwasshockedandcouldn'tcontrolthebikeatall．Mybikeranintotheboyandhefell．Hedidn'tgetveryseriouslyhurt，buthisgrandmawastooangrytoacceptmyapology．Mycousinappearedfiveminuteslaterandsavedmefromthemess．Buttheexperiencefrightenedme：Inolongerdaredtorideabike．

　　Then，lastyear，freebikeswereofferedtochildren．Mymothertriedtoteachmehowtoride．ButthetrafficmademesonervousthatIhadtoridereallyslowly．ButI'mnotgoingtogiveup．Oneday，believeme，you'dseemeridingabikeinabigstreet．

　　50．Whendidthewriterbegintorideabike？___

　　A．Twoyearsold．

　　B．Threeyearsold．

　　C．Fiveyearsold．

　　D．Sevenyearsold．

　　51．Whotaughtthewritertorideabikewhenhewasfive？___

　　A．Hisfather．

　　B．Hismother．

　　C．Hiscousin．

　　D．Noone．

　　52．Whydidthewritersay"Inolongerdaredtorideabike"？___

　　A．Becausehisparentsdidn'tallowhimtorideabike．

　　B．Becausehedidn'thavebikesanylonger．

　　C．Becausehehitasmallboyandwasveryfrightened．

　　D．Becausehewasafraidofthatsmallboy'sgrandma．