Do you still remember the day ___you first came to shanghai?

题目

Do you still remember the day ___you first came to shanghai?
A.that B.in which C.on which D.which 为什么介词用on

答案

on the day
星期,日,月,都要用on 比如：on that day,on Friday,on March
年用in 比如：in 1999.
但是如果年月日一起就用on,比如：on the 1st,1999.(只要有日,就用on)