1. I've seen your teacher, and he's told me that you haven't finished your assignments .
2. Have you travelled to Australia ?
3. No, I've been there.
4. Have you called your father ? Yes, I've told him that we are leaving.
5. We are living in the same place. In fact, we've changed places
6. We've bought a new tent, so we can all sleep inside.
7. Have you finished eating that ? No, not yet.
8. This book has arrived. It's what you wanted.