He fired the cannon using gunpowder.

I went to the pharmacy to buy pharmaceutical drugs.

This medicinal shampoo helps maintain scalp health.

I'm really having difficulty with his behavior.

I have the night shift tonight.

I like observing wild fowl.

He is researching about the sphincter in the digestive system.

He became famous overnight.

In order to keep my agreement with him, I never break a promise.

He became famous overnight.