A. Good afternoon, Helen.

B. This is Wang Bing. He's my friend.

C. Hi, Wang Bing.

D. Hi, Liu Tao.

E. Good afternoon, Liu Tao.

—_______

A. Good morning, grandpa.

B. This is my family.

C. This is me.

D. Good evening.

E. This is my mother.

F. He's my brother.