1 When my father came home, I was having dinner.
2 When Alice returned, I was listening to the radio.
3 When 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 cought 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.
8 When he was washing the dishes, he broke a plate.
10 What were they doing, when you saw them?