Dear Mr White,
I am writing tell you a piece of good news. Last week our school hold a Spoken English Competition. I stood out in the competition and won a first place. In my view, it is your kind help which has helped me gain the achievement. During your spare time, you often spent such much time helping me with your spoken English that I made rapid progress. In the competition, I followed your advices on how to behave, which led to my success. I’m grateful to you for your help and decide that I will make up more efforts and try to make great progress in the future.
I’m looking forward to hear from you soon.
Yours sincerely,
Li Hua