1. I've read that book.
2. I read that book last year.
3. My parents have lived in Chadan for twenty years.
4. Two years ago I returned to Chadan.
5. Before our graduation we have often met each other.
6. We spent two weeks in Todzha last year.
7. I have never been to Mongun-Taiga.
8. My friend has been there several times.
9. She was in Abakan last summer.
10. I have never seen the sea.
11. My friends had a good time at the party last night.
12. I watched an interesting programmer on television last night.
13. I have never travelled by plane.
14. They went on an excursion by bus last night.
Объяснение:
1. its
2. their, it
3. my, it
4. hers,them,her
5. your,it
6. their,yours,mine
7. you,your,mine
8. her, yours
9. yours,your
10. its