A) i live in almaty. how b) i know dmitry. how c) omar is learning german. how d) i'm waiting a letter. how e) i'm waiting for my friend. how

A) How long have you been living in Almaty? b) How long have you known Dmitry? c) How long has Omar been learning German? d) How long have you been writing a letter? (У тебя ошибка в вопросе правильно не waiting а writing) e) How long have you been waiting for your friend?