1. I was sitting in front of the fire  h. when they came back from the theatre..
2. I was getting the tea ready i. when my husband arrived home from work.
3. she was looking for some curtains e. when she saw this lovely material. .
4. She was finishing her tea g. when there was a knock at the door. .
5. She was going down the garden path j. when she stopped and waved. 
6. He was playing the piano  a. when the film began. .
7. You were sweeping the floor d. when mother came into the room. .
8. The girl was sleeping b. when the telephone rang.
9. They were working in the garden f. when the teacher looked at.
10. You were not listening to her..c. when she called out to me.