Children get gifts ____ Christmas and ____ their birthdays.

问题描述:

Children get gifts ____ Christmas and ____ their birthdays.
A.on; on B.at; on C.in; in D.in; on答案是B,A为什么不可以

固定用法.
在New Year’s Day,May Day,Children’s Day,National Day前应该用on,在Easter,Halloween,Christmas,Spring Festival,Dragon Boat Festival 和Mid-Autumn Festival前用at.
简单记:看见这个节日中有Day,就用介词on,其余都用介词at.