1. I have lost it.
2. I was very tired ,so I went to sleep.
3.Mary went to Australia for a while but she is back again now.
4. He has gone out.
5. I did German at school but I have forgotten most of it.
6. I meant to phone Diane last night but I forgot.
7. I had a headache earlier but I feel fine now.
8. There has been an accident.
9. They haven't finished it.
10. No she has just gone out.
11. The police arrested three people but later they let them go.
12. Ann gave me her address but I'm afraid I've lost it.
13. It has disappeared.
14. Do you think I have improved it ?