Dear presenter，
I’m writing this letter because I want to thank my best friend Kate and send my best wishes in your programme ． Kate helps me a lot in my school subjects，especially English．She not only tells me how I should learn it，but also talks with me in English to improve my speaking．I’m very lucky to have Kate as my friend．Next Friday will be her birthday．I’d like to thank her for helping me and I wish her happy birthday．I also have a song for her called，“You’re my best friend，”and tell her that she will always be my best friend．
So much thanks ．
Yours,
Zhou Xin