Ответ:

Dear Andrew,

thank you for your letter. Sorry I haven‘t written for a while since I‘ve been busy preparing for my exams.

I think it would be a great idea for you to start practicing a sport. Since your goal is to be fitter, I would advise you to choose basketball. It‘s also popular in Russia along with football and volleyball. In my school they sometimes organize competitions between volleyball or football teams.

Sorry, I have to go now, my mum is calling me. I‘m looking forward to hearing from you soon!

Best wishes,

*Твое имя*