How to use "headmaster" in a sentence

The secretary outside the headmaster's room tells them they can enter, but Smith stops

The headmaster is a man about the same age as Smith, but there the comparison ends

The headmaster, Mr Bowen, does not exactly look happy, but he looks content

The headmaster tells them to sit in the same voice he uses for his students.

"Show them out Miss White." And the headmaster does not look at them again.

I came here to tell Mr Cliff what the headmaster said about the argument."

Then the hammering they heard in the headmaster's office starts again, and the policemen go to the door.

They heard it in the headmaster's office