(ваш) Адрес
(дата написания)
Dear, (имя вашего собеседника)
I was glad to her your letter. Your last letter was a real surprise. Thank you for the congratulation. I`m going to invite my best friends.
I`m having a great time with them. My favorite food is fruit salad and chocolate cakes. My mum makes stunning cake from berry. My friend love it. What would you like to receive for your birthday?
Anyway, I have to go now because my mum asked me to help her with the washing up.
Drop me a letter when you can.
Love (ваше имя)