Ответы
1. By the time I got to the station the train had left.
2. Patrick's mother was very angry when he came home late because she had been worrying about him all evening.
3. The children started a fire. They had been playing with matches.
4. Brenda had disappeared before I had time to talk to her.
5. Bruce went to hospital because he had cut his hand while he was trying to mend a broken window.
6. It had been more than a month before I realized what had happened.
7. When Jack had not arrived by 6 p.m. I knew he had missed the bus.
8. When I met him he had been working as a plumber for a year or so.
9. We had scarcely started eating when there was another scream.
10. We had looked through the agreement before we signed it.
11. I was very pleased when my son found my watch because we had been looking for it for hours.
12. Nina thought she had left her purse in a locker in the changing room the day before.