Dear Mary,
How are you.
I'm writing this letter to express my heartfelt appreciation of what you have done for me over the past semester. As a friend online, you have not only helped me a lot in improving my English skills, but also had many candid discussions with me about my future plan for career development. To tell you the truth, I feel so encouraged by our online chatting that I now have full confidence in my success after graduation.
I'm really lucky to bump into a good and true friend like you in the virtual world of the Internet. I hope we can keep this beautiful friendship for a lifetime. And in the future, if you need any kind of help from me, just tell me. I promise I will do my best to assist you, just as you did for me.
Keep in touch. Wish you every success in life and career!
Yours sincerely,
Li Hua
给的素材太少,也只能写这么多了,不过100字肯定超过了.请放心采用.
对了,别忘了给我前几天做的完型填空采用加分哦.
祝圣诞新年快乐.