1. Jack: I think I have lost my sunglasses. I have been looking for them since noon, but I can't find them. And they were very expensive!
Andy: I have lost three pairs so far and I have learnt my lesson. I only buy cheap sunglasses now. Maybe you left them at Harry's house this morning.
Jack: No, I have already asked him.
2. Debbie: This is the most interesting book I have ever read.
Pat: Where did you get that book? I have been trying to find it for months now!
Debbie: My brother gave it to me.
3. Tony: I'm afraid Tom isn't here. He has been delivering newspapers since 7:00 am, but he should be back soon.
Peter: He has left three messages on my answering machine but I'm not home, so please tell him to call me at my grandparents' house. I have been staying with them for the past two weeks, but I forgot to tell Tom when I last saw him.