Dear …,
Thanks a lot for your letter. Sorry I haven’t answered earlier but I was really busy with my school. I miss you greatly!
In your letter you told me that you caught a cold. Well, i feel so sorry for you and wish i was there to help. I hope you consult a doctor soon. When I caught a cold last time, i felt very sick and tired. I hardly ate anything and had a bad headache. To quickly recover i went to the hospital right away and bought all prescribed medicines after. Also I didn't push myself too much and slept a lot. To stay healthy I often play baseball and go to the swimming pool atleast once a month. Also I try to balance my diet eating as much fruits and vegetables as possible. (отвечаем на ВСЕ вопросы)
Actually, I’d better go now as I have to study for my exams. Take care and stay in touch!