How many classes did you have in Senior Three every day?

按照实际情况回答就是了。

对啊，是几节课就说几节课，还犹豫什么啊，想想当年我们都是那样过来的
I had seven classes in senior three every day.

直接说一个数字（按课程数而答）
这是最简单的，而完整的就比较死板，口语一般是不必完整的

I have X classes in senior three every day.