Question

Those are my parents.(改为一般疑问句） They are my aunts.(改为否定句）

That's my sister
（对my sister部分提问）
Are they your brothers?（作否定回答）
That's his coesin.（改为复数句子）
This is my mother and this is my father.（改为同义句）

Answer 1

Are those your parents?
They aren't my aunts.
Who is that?
No,they aren't.
Those are their consins.
They are my mother and father.

Answer 2

Are those your parents?
They aren't my aunts.
Who is that?
No, they aren't.
Those are their/his cousins.
These are my parents.

Answer 3

1 Are those your parents?
2 They aren't my aunts.
3 Who's that?
4 Those are his cousins.
5 These are my parents.

Answer 4

Who' that?
No, they aren't.
Those are his cousins.
These are my parents.

Answer 5

Are those your parents?
They aren't my aunts.
Who is that?
No,they aren't.
Those are their consins.
They are my mother and father