1She went for holiday after she had passed her exams.
2. When I got to the cinema, the film had already started.
3. She felt sick after she had eaten a whole box of chocolates.
4. After she had locked all the doors, she went to bed.
5. When we came back, the telegram had already arrived.
6. Was Tom at the party when you arrived? - No, he had gone home.
7. The house was very quiet when I got home. Everybody had gone to bed.
8. Sorry, I'm late. The car broke down on my way here.
9. We were driving along the road when we saw a car that had broken down, so we stopped to help.
10. I thanked her for everything she had done for me.
11. When I got to the Academy, I realized that I had forgotten to lock my house.
12. I took my family to Voronezh last year. I had been there as a student, so I knew my way around.
13. He had been a porter before he had become a businessman.
14. I felt a little better after I had taken the medicine.
15. I was late. The teacher already had given a quiz when I got to the class.
16. We had a good rest after all our guests had left.
17. By the time we came, the party had finished.
18. Yesterday I saw Pam, who I hadn`t seen for ages. At first, I didn`t recognize her, because she lost at least 50 pounds.
19. It was raining hard, but by the time the lesson was over, the rain had stopped.
20. Millions of years ago dinosaurs roamed the earth but they had become extinct by the time humankind first appeared.
2. have been
3. has gone to
4. has been
5.has gone to