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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 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 at the party.

9. When he was washing the dishes he broke a plate.

10. What were they doing when you saw them ?

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