1. 补全对话

A. Here you are. B. It's an egg. C. How old are you? D. Have some bread. E. I'm nine.

A: Hello, Li Lin.

B: Hi, Wang Na.

A:

B: I'm seven. And you?

A:  What's this?

B:

A:

B: Thanks. I'd like some milk, too.

A:

B: Thank you.