Dear Mark,
Thanks for your letter. I'm sorry i haven't write you earlier as i was very steeped in my studies.
I'm very surprised because of your unusual choice. To tell you the truth profession which i have chosen relates to traveling very much. I want to become a journalist and experience odd cultures and communicate new people with various interests. Besides, i like doctors' profession because they show their braveness while saving people's lives. Moreover, to my great surprise, my friends are fond of professions connecting with governmental ( national) service, like lawyers, judges and another.
Well, i have to conclude my letter now as i have to help mom with cooking. Hope to hear from you soon!
Fondly , имя
P.s в начале в верхнем правом углу нужно добавить также адрес.