New York and Washing D.C are good places to visit ___ May or OctoberA fromB at c in D on
问题描述：
New York and Washing D.C are good places to visit ___ May or October
A from
B at
c in
D on
答
c in
表月份用in
答
C in， 确定的某一时间才用on
答
c
答
C
在某个月份用in
答
c in
答
C年 月 季节 在一天的早上晚上都用in
O(∩_∩)O~
答
C