Dear XXX,
How are you? It has been a long time since we last wrote to each other.
How are you doing in school? Were there any interesting events?
I have been trying very hard to learn English, but it has not improved much. I heard that your English is good and I would really appreciate it if you could give me some tips on studying English. How can we improve quickly over a short period of time? Also, do you have any shortcuts in learning grammar, gaining vocabulary and improving English speaking skills?
I will be anticipating your reply! Thank you so much!
Yours sincerely,
XXX