Just refuse and tell her that as far as I know, some instructors have different requirements, so it's not good for me to change this.

If she says nothing, it's the same. You have been telling her that our teacher is not as difficult as yours. Besides, why did you wait so long to do it? I've been trying to do this before. (condemning her inaction)

Of course, you may have helped her by now. Just tell her in a joking and slightly condemning tone, I'll go and help you correct the paper. I'm so tired. Why didn't you reply that day? Or, alas, I feel that I am going to die suddenly. Hint that she will make it up to you and most people will buy you a drink. If she doesn't give it, you'd better pull it away.

Friendship is like a flower, which fades when spoken.