1 Your house is bigger than mine.
2 Do you like their house better than his?
3 Your garden is smaller than theirs.
4 My children are older than hers.
5 This book isn't mine. Is it yours?
6 Whose dictionary is this? Is it his?
7 Who's talking to your sister?
8 Who's going to her party tonight?
9 Whose dog is that in our garden?