It doesn't really matter. If you usually get high marks, it is normal to miss occasionally. Don't worry about it.

But I don't know what your father will think. You can say: Dad, what would you do if I got a low score? If he has a good tone, tell him ~ ~ If not, try to comfort him. I think my first sentence just now seems quite good. Try telling him ~ ~

Come on ~ ~ You will definitely make a difference in the future, as long as you have a good attitude ~ ~