Ответ:
2. had been travelling;
3. had had
4. have lived
5. has she been teaching
6. have known
7. has been
8. has lost; has happened/happened
9. have ever seen
10. left
11. has saved
12. had not had
13. has not she responded
15. have noticed; has been replacing
Объяснение:
3. результат к определенному времени в прошлом