A She's my mother.   

B This is my mother.

A Hello. Are you Miss Li?   

B Hi. This is Miss Li.

Good afternoon, Miss Li.

Are you Liu Tao?

Good afternoon.

No, I'm not. I'm Wang Bing. This is Liu Tao.

Hi, Miss Li.

Hi, Liu Tao.

⑴Are you Yang Ling?                   A. Hi, I'm Bobby.

⑵She's my friend.                        B. Good evening, Tim.

⑶This is my brother, Mike.          C. She's my friend too.

⑷Hi, I'm Sam.                               D. Yes, I am.

⑸Good evening, John.                 E. Hello, Mike.

A: Hello, I'm Tim. Are you Wang Bing?

B: No, I'm not. I'm Liu Tao.

A: Nice to meet you.

B: Nice to meet you, too.

A: Who are they?

B: They are my family. This girl is my sister. She's Liu Yang. This boy is my brother. He's Liu Tian.

A: Oh! Let's play together.

B: OK.