0. When Tony arrived, everyone had left. The house was empty.
1. I knew there had been an earthquake but I didn't realise how bad until I had seen the news on TV.
2. She was sleeping when she heard a strange noise.
3. I wake up late and the house was empty. Mum had already gone to work.
4. He saw his aunt last week. He had not seen her for two years.
5. When Uncle Dave's train arrived at the station, everyone was waiting there for him.