He is not good at ____.
math
What subject are you good at?
I am good at music.
What's your favorite subject?
My favorite subject is P.E.
What's your favorite subject?
My favorite subject is art.
What subject are you good at?
I am good at science.
What's your favorite subject?
My favorite subject is math.
She is good at ____.
social studies
Are you good at English?
Yes, I am.
Are you good at art?
No, I'm not.