Is this your brother?
Yes, it is./No, it isn't.
Are these your brothers?
Yes, they are./No, they aren't.
Is that your sister?
Yes, it is./No, it isn't.
Are those your sisters?
Yes, they are./No, they aren't.
Is this your brother?
Yes, it is./No, it isn't.
Are these your brothers?
Yes, they are./No, they aren't.
Is that your sister?
Yes, it is./No, it isn't.
Are those your sisters?
Yes, they are./No, they aren't.