Complete the following sentences. past progressive

1. at three o'clock yesterday the students of our

2. when the teacher came in, the

3. when we heard that the phone rang,

4. when the lights went out,

5. when it began to rain,

6. we saw an accident while

7. someone phoned me when

8. i met my friend when

9. she burnt her hand when

10. yesterday while he was fixing the

11. she was reading a book by stephen king

12. they heard some noise