Dear _____,
Thanks for your recent e-mail (email message/ message/ email letter). It’s always great (nice) to hear from you. Sorry for my late reply but I’ve been really pressed for time lately.
In your e-mail you’ve asked me about ____ and I’d like to answer your questions. (In your e-mail you’ve asked me some questions and I’ll be happy to answer them.) Actually, ____(отвечаем на первый вопрос). To tell the truth, ___ (отвечаем на второй вопрос). As for your last question, ____.
That’s all for now. (Sorry, I have to go now because it’s high time I went to bed.) Write back soon.
Yours,
(имя)
Dear ____________,
Thank you very much for your last (recent) email letter. I was very glad to get it. How are you? How is your family?
In your letter you’ve asked me about ________________ and I’m writing to answer your questions. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________.
I’m sorry, I must finish now because I have a lot of things to do.
Write back soon.
Best wishes,
______________