Dear (Имя друга),
Thanks for your letter. I want to tell you what happened last weekends. So, I with my friends rode in the village, where we went to the river. It was very cool. We swam, ate sausages and talked about funny adventirous. In the evening we jumped bungee and i got a spill. I felt powerfull pain in my arm. My friends taken me in the hospital. Doctor said that i broke my arm and i should stay at home to be in full peace. My friends visit me all the time. Do not worry about me. I am OK.
And what about you? Hope to hear from you soon.
With love, (ваше имя)