根据对话内容，将方框内符合对话情景的句子抄写在对话的空白处，使对话恢复完整。选项中有两多余的。 A: Exc:use me, l'd like to ask you some questions, Miss Black.____1____ B: Not very big, but  I don't think it's small.1 have two brothers. The elder one is married. A: Do your brother aIl his wife have any children? B：Yes._________2_____________ A: Boys or girls? B：A boy and a girl. A: Oh, how lucky they are! B: In China, there are still quite a lot of large families. A:_______3__________Thanks to the 'one-child' policy, fewer and fewer families now have more than one child.________4__________ B:______5_______Is your family large? A: No,I have only one sister, but my grandparents also live with us. B: In America, many children live far away from.their parents when they are just 18 0r 19. A: In China, too. More and more young people live far away from their parents when they are married. How about your family? How old are you? Why don't you have more children? I agree with you. Do you have a big family? So more and more families are becoming richer and richer. My sister-in-law aave birth to twins last March.