The students study ___school___Mondy to Fridy.

问题描述:

The students study ___school___Mondy to Fridy.

让我来解答吧:
具体日期/星期及具体某天的上午/下午/晚上前用on;在年/月/季节及某个上午/下午或者晚上前用in;在时刻前用at.
from一般用于地点,显然与题目不符
答语应是:in;on