His voice change is a natural phenomenon that occurs as part of puberty.

When he was young, he belonged to the army.

He belongs to the Japanese navy.

He works as a pilot in the air force.

He took command of all the armies.

He broke his radius in a skateboard accident.

He is studying the shape of the skull.

My grandmother is good at making traditional Tang confectionery.

He made the sentence clear using commas.

Touten is always the most energetic in the class.