补全对话。

A: Excuse me, Miss Black. 1______.

B: Not very big, but I think it's not fairly small. I have two brothers. The elder one is married.

A: Do your brother and his wife have any children?

B: Yes. 2 ______.

A: Boy or girls?

B: A boy and a girl, so I have a niece and a nephew.

A: Can a sister and a brother be twins?

B: It's uncommon but possible. In China, there are still quite a lot of large families, aren't there?

A: 3 ______. Thanks to the "one-child" policy (政策), very few families now have more than

    one child. 4 ______.

B: 5 ______. Is your family large?

A: No, I have only one sister, but my grandparents are living with us.

B: In America, children often move away from home when they are just 18 or 19. It's sad. Many

    children live far away from their parents.

A: In China, too. More and more young people live far away from their parents when they are

    married.

A. How about your family?

B. My sister-in-law gave birth to twins last March.

C. Are your married?

D. So more and more families are becoming richer and richer.

E. Do you have a big family?

F. I agree with you.

G. I don't think so.