1. B: Who is she?

    Amy: She is my mother.

2. B: Who is he?

    Amy: He is my grandpa.

3. B: Who are they?

    Amy: They are my aunt(and)uncle.

4. B: Who are they?

    Amy: They are my grandpa(and)my father.

5. B: Is he your brother?

    Amy: No, he isn’t. He is my cousin.

6. B: Are they your mother(and)father?

    Amy: Yes, they are.