读一读，从方框中选择适当的句子补全对话。

A. How old are you? B. Good morning, Sarah. C. Nice to meet you, too. D. Happy birthday! E. This is my brother, David.

Chen Jie:

Sarah: Good morning, Chen Jie.

Chen Jie: Thank you. Come in, please.

Sarah:

Chen Jie: I'm nine years old.

Sarah: Nice to meet you, David.

David:

Chen Jie: Let's have the cake together.