____ hot summer days i go swimming and i do so ____ warm winter days,too.

题目

____ hot summer days i go swimming and i do so ____ warm winter days,too.
A.In;on
B.On;on
C.In;in
D.On;in
为啥选A?
答案是这么写的.

答案

英语语法中,季节都是用in…都是指定的,天都是用on the day.