Make the sentences complete using either the Past Continuous or the Past Simple of the verbs in brackets

1. When I switched on the light I … (see a strange scene).
2. When the lecturer entered the room the students … (talk in loud voices and laugh).
3. He heard a strange noise when he … (come up to the house).
4. Nobody was listening to what he … (say)
5. When I entered the shop the shopgirl … (show a nice dress to an elderly lady)
6. Mr. Brown was making a call when his secretary … (bring in the morning post).
7. When she was five her mother … (teach her English)
8. It was already late and the people … (leave the party)
9. The ball was at its peak when John … (arrive)
10. The ship ran against a rock and … (sink) quickly.
11. It was cold and a strong wind … (blow from the North)
12. The patient was very ill and people … (talk in low voices).