看图，选择下面的句子，把对话补充完整，将序号填在( )内。
( )（1）A. I'm four. B. Four. C. I'm fine, thank you.
( )（2）A. She's my mother. B. He's my father. C. He's my brother.
( )（3）A. Nice to meet you. B. Good morning. C. Good afternoon.
( )（4）A. He's my father. B. She's my sister. C. He's my brother.