Ответ:
Ex. 1
1. The pleasure was all mine.
2. Our house is on that street. His is round the corner.
3. It was thought no fault of hers.
4. You can very well do without my help, but not without theirs.
5. Her handbag is on the chair. Mine is on the sofa.
6. Ours was the last turn.
Ex. 2
1. This doesn't look like my book, it must be yours.
2. Tell him not to forget his tickets, she mustn't forget hers either.
3. Tell me, isn't that your girlfriend over there?
4. I see that he has lost his pencil, perhaps you can lend him yours.
5. He has come to see me, because his father and mine are school friends.
6. This is my work, I did it without any help at all.