根据首字母以及文段提示,补充完整文段.

问题描述:

根据首字母以及文段提示,补充完整文段.
There are 12 months in a year.In different months,we have different (e ).Our school's birthday is September 1st.It's the ninth month of the year.So we have School Day in that month...

events,事务,活动,一般是大型活动