1.The audience was applauding until he fell off the stage.

2.I was making dinner when she arrived.

3.At 6 o'clock, I was eating dinner.

4.She was talking constantly in class in those days.

5.At noon, he was arriving.

1. I was reading the book, when he came

2. She was watching TV, when her mother called her

3. We were walking in the park, when I met my old friend

4. They were playing volleyball, when I came.

5. He was cooking, when his sister came home from school.