He is a successful manager.

He was taken to the hospital because of appendicitis.

There are many shops in the central part of this town.

I eat lunch at home every day.

Studying the history of the Middle Ages is very interesting.

My father runs a small to medium enterprise.

Abstract nouns do not point to specific things.

Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.

He used a syringe to inject the medicine.

He had to pay a fine for a parking violation.