来自刘政华的问题
TombSweepingDay，oneofthefewtraditionalChineseholidays，usuallyfalls_______April4，5，or6．（）A.InB.OnC.atD.from
Tomb Sweeping Day，one of the few traditional Chinese holidays，usually falls _______ April 4，5，or 6．（）
A.In
B.On
C.at
D.from
