it's very cool to eat ice cream_____a hot day A.in B.at C.on D.for
问题描述：
it's very cool to eat ice cream_____a hot day A.in B.at C.on D.for
答
C.on
在具体的某一天用on,固定用法.题目中指在一个非常炎热的夏天.
如：on a cold day/on Monday等