Ответы и объяснения

Dear адресат,

Thanks a lot for your letter. It was great to hear from you again. I`m sorry I haven`t answered earlier but I was really busy with my schoolwork.
In your letter you asked me about myself. At the moment, I doing my homework and listening to music. As for my health, I very rarely get sick and do sport everyday. I run every morning, therefore I never get sick.
I want to ask you a few questions. How old is your brother? Have you any pets at home? You don`t like sports, do you?
Well, I`d better go now as I have to do my homework. Write back soon!