He is very excellent in the field of arts and sciences.

That theory is unscientific and has no evidence at all.

He is majoring in belles-lettres.

He lost his sense of direction.

He is studying hard to enter the next level of school.

He commutes to school by bicycle every day.

He decided to drop out of school due to the difficulty of his studies.

He is a world-famous mathematician.

I bought a new study aid for my math exam.

My sister works as a physical therapist.