The main focus of this book is on an overarching principle in foreign language use that the authors of this book call Adherence to the Known - using the level of language you control in order to say what you want. The book presents 1) more than 350 lexico-grammatical models of the Russian language at four communicative levels, 2) examples of texts expressing the same ideas written at four different levels, 3) special exercises designed to help students...