题目内容：

完成下列对话并表演

TOM: Dad, 1. 2. my friend, Lei Hao.

Lei Hao, this is my 3..

LEI HAO: Good morning, Mr. Brown.

FATHER: 4. 5., Lei Hao. How do you do?

LEI HAO: 6. 7. 8. 9.?

FATHER: Please sit down.

LEI HAO: 10. 11. 12. 13..

TOM: Kate, 14. 15. my classmate, Lei Hao.

LEI HAO: Hello, Kate!

KATE: 16.! 17. 18. 19.?

LEI HAO: I'm fine. Thank you. 20. 21.?

KATE: I'm OK.