(your city)
Russia
21/03/17
Dear Mary,
Thanks for your last letter. I'm sorry I haven't written for ages because I was busy with my homework.
Anyway, I'm going to answer your questions. Usually, I get good marks such as 4 and 5 it's like A's and B's marks in your country. I don't worry about my school marks but I worry about me school exams.
Well, that's all for now. I hace to finish because I need to cook dinner. Write back soon.
Yours,
(your name)