填写适当的句子补全对话

A：Hi, Lily!

B：Hi, Jane! Jane,  are those?

A：Oh, they are my friends, Lisa and Sally.

B：And are these your friends, too?

A： . They are my sisters.

B：Is he ?

A：Yes, he is my brother.

B： ?

A：They are my grandparents.

B：Wow, you have a big .

A：Yes, you're right.