work hard at your lesson还是on your lesson

问题描述:

work hard at your lesson还是on your lesson
work hard at your lesson还是
on your lesson 还是都可以?

2者皆可 at用在学业上 on则泛指一切努力的对象
You always work hard at your lessons and I wish you success in your College Examinations.你总是很用功,我祝你高考成功.
-- 高中英语口语25天快训 - Day 15 Congratulations