Some volunteers from Beijing arrived in Shanghai______April 29 to work for the world Expo.
问题描述：
Some volunteers from Beijing arrived in Shanghai______April 29 to work for the world Expo.
A.on B.at C.of D.to
应该选什么?
大家可不可以说一下这些词的区别
答
on 有年有月介词IN 有了日子要用ON