1. b 2. a 3. c
1. Linda: Who's that man?
Mai: He's my father.
Linda: Really? He's young!
2. Linda: And who's that woman?
Mai: She's my mother.
Linda: She's nice!
Mai: Thank you.
3. Mai: And that's my grandfather.
Linda: He is nice too.
Mai: But he isn't young. He's old.