Question

a day he will never forget

July 13th,1913 is a day( ) he will never forget. His father was murdered on that day.
A. that B. which 选哪个,为什么?

Answer 1

A
he will never forget the day
forget这里缺少宾语,表面看两个都行.
但这里前面是 a day,再用he will never forget修饰,表示的就是强调'a day',所以用that.
It is a day that he will never forget.