1)She gave me her address and I gave her mine.
2)They gave us their address and we gave them ours.
3)We gave her our address and they gave you theirs.*
4)You gave them your address and they gave you theirs.
5)He gave you his address and you gave him yours.
*(по логике упражнения здесь должно быть "she gave us hers" - но если там нет опечатки, тогда не обращайте внимание на этот комментарий)