1. When my mother came home, I was having dinner.
2. When Kate returned, I was listening to the radio.
3.When Mum entered his room, her son was drawing something.
4.When my sister came in, I was doing my lessons.
5. My friend was playing with his cat when I came to see him.
6.When we were doing our project, my sister entered the room.
7. They were disscussing the latest news when the telephone rang.
8.The young people were dancing when the parents returned home.
9.When he was washing the dishes, he broke a plate.
10.What were they doing when you saw them?