1. When my
father came home, I was having dinner.
2. When Alice returned, I was listening to the
radio.
3. When his
mother entered his room, he was drawing a picture.
4. When my
sister came in, I was doing my lessons.
5. When her
aunt was airing the room, she caught cold.
6. When I
met her, she was going to the office.
7. He was washing
his face when somebody knocked at the door.
8. The
young people were dancing when I came to the party.
9. When he
was washing the dishes, he broke a plate.
10. What were
they doing when you saw them?