假设你是李华，曾在美国学习半年，现已回国。你想联系你的美国老师Mr. Smith,但没有其联系方式。请根据以下要点给你的美国同学Tom 写一封信：

　　1. 感谢Tom对你英语学习的帮助;

　　2. 询问Mr, smith 的近况并索要其联系方式;

　　3. 邀请Tom在春节期间来中国感受中国文化。

　　注意：1. 词数120-150;

　　2.可适当增加细节。

　　【参考范文】

　　Dear Tom,

　　I am now back China and sound. In this letter I would like to convey my heartfelt appreciation to you for your kind assistance in my English learning when I was in New York. Additionally, your generous help and tender care made me feel warmly welcomed and transformed my first American trip into a unforgettable memory.

　　I have been missing our English professor, Mr. Smith whose unusual cast of mind, wide and varied knowledge, together with a singular personal charm, combined to exert a strong influence on me. What about him recently? I desire to contact him for some suggestions on improving my listening ability. However, his email address is not available. So would you mind delivering it to me via the online mailbox?

　　I am more than delighted to invite you to join us to celebrate the Spring Festival -Chinese Lunar New Year so that I can repay your friendship. You can partner with me to have a try in lion dances ,which is extremely exciting. And the grand lantern festival parade will be bound to impress you. I assure you that you would enjoy visiting here as I did at you home.

　　With my best regards! 

Yours cordially, 

Li Hua