Dear XX
I am writing to extend my sincere gratitude for your help in English learning.We went through the university-entrance exam together last year.At that time You help me in my study to improve my examination performance.As we know,college life is full of interesting things and I think you will have a rich experience in the university.By the way,the CET-4 examination is coming, I really look forward to have a great result.Do you know why？Because we have many chances to exercise our ability, we do the exam better，we promote the study spirits better.
At last，I want to thank you for the way you accompany with me.You are my best friend.There is an old saying that"：Wish our friendship is enduring as the universe. "
Yours faithfully
xx
