on my day off是什么意思

题目

on my day off是什么意思
一道选择题:
---Why didn't you go to visit the Great Wall with your friends last Saturday?
---Because it rained_____
A.all day B.yesterday C.at that time D.on my day off
选什么啊

答案

DAY OFF 是休息日的意思
选A 下了一整天的雨
问你上周六干嘛不去长城,B和D的回答显然不对题.C也不太适合.所以选A