How to use "smells" in a sentence

But the smells are the worst

Delicious smells that make the stomach rumble

The smells and sounds make a horrible mixture.

It smells no different, he thinks as he enters

Inside, the school smells of wood and polish, and on the walls there are antique pictures of old teachers and respected students.

The grass below their feet is green and fresh, the trees are heavy with leaves, and the air smells so good that Owen forgets about Junior's mood