1. The man was reading a magazine when somebody knocked at the door. 2. He was waiting for a bus. 3. The boy was skating. 4. The students were dancing when I opened the door. 5. The girl was eating ice-cream when we came in. G. She was looking after her little brother. 7. The pupils were discussing a story. 8. The man was passing the theatre when the clock struck ten. 9. It was snowing when we went out. 10. The boy was running very fast.