来自白征的问题
christmas前面用的介词是at还是on?
christmas前面用的介词是at还是on?


christmas前面用的介词是at还是on?
christmas前面用的介词是at还是on?
at如果节日是...Day的形式,用on如:OnChristmasDay,onChildren'sDay,OnNewYear'sDay,如果后没有Day,则用at,如:atChristmas,atNewYear,atspringfestival