Oh! I can't believe he remembered! 哦！我真不敢相信，他居然还记得！

Remember back in college? We had a lot of fun. 回想上大学的时候，我们当时很开心。

How can you not remember that? 你怎么能想不起来呢？

Did you take your vitamins this morning? 你今天早上吃维生素片了吗？

I don't remember. I'll take them now. 我不记得了。我现在就吃。