They were trading goods through barter.

I exchanged my old smartphone for a new one.

Let's exchange keys tomorrow.

We exchanged our old books for new ones through barter.

We write in the exchange diary every day.

We wrote essays for peer grading.

He works at the switchboard.

We respect Japanese culture.

We are going on a trip tomorrow.

When I first met her, I introduced myself saying, 'I am Japanese.'