补全对话。

A. Are you thirsty? Have some water. B. Thank you. C. Good morning, Miss Yang. D. His name is Joe. E. I am happy, too.

Teacher：Good morning, boys and girls.

Students：

Teacher：This is your new classmate.

Students：Hello, Joe.

Joe：Hello, everyone.

Teacher：Are you happy, everybody?

Mary：Yes. I am happy.

Tom：

Teacher：You can sit here.

Joe：

Tom：

Joe：Yes, I am. Thank you.

Tom：You're welcome.