6. I didn't recognise Lucy, because she had grown her hair very long.
7. The man told me that he had been to Russia a few years before.
8. Everything was white and beautiful, because it had snowed in the night.
9. Because I hadn't made an appointment, the manager refused to see me.
10. When I had done the washing up I sat down and read the paper.
11. My hands are dirty, because I have been repairing the car.
12. I have not been enjoying my job recently.
13. George has been helping me in the office since Tuesday.
14. I have been having a headache since this morning.
15. Anthony has been away for the last few days.
2. After graduating from the university, she left St. Petersburg and went to teach in her home town.
3. After proving that his theory was correct, he started studying ways and means of improving the conditions of work in very deep coalmines.
4. After taking the child to the kindergarten, she went to the library to study for her examination.
5. After making a thorough study of the subject, he found that it was a great deal more important than he had thought at first.