Dear Arthur, Thank you for your recent email. It was nice to hear from you again. Sorry, I haven't written to you earlier. I was busy doing my project on Biology. - можно сочетать You asked me about ... . Well, I can say that ... + ответы на 3 вопроса (в одном абзаце, с использованием логических переходов) Write back soon. / Hope to hear from you soon. - необходимо выбрать одну из фраз Best wishes, Kate