Ответ:

1. When I had finished my breakfast, I brushed my teeth.

2. When the students had done the exam, the teacher said they could go.  

3. He went to bed after he had put his pyjamas on.  

4. She dried her hair after she had washed it.

5. They took her to hospital because she had had an accident.

6. They didn't see the start of the film. When they arrived at the cinema , it had started.

7. When he had written the email, he sent it.  

8. They went into the museum when they had bought the tickets.

Объяснение: