Objective Proficiency Second edition provides official preparation for the revised 2013 Cambridge English: Proficiency exam， also known as Certificate of Proficiency in English （CPE）。 A variety of challenging， lively topics provide thorough training in exam skills and high-level language development。 Each unit contains three double-page lessons ensuring flexibility， even pacing and progress。 Interactive software， downloadable from a URL contained in the Student's Book， provides activities for practice of exam skills， grammar and vocabulary。 Exercises and examples tackle areas that Proficiency students often find challenging， identified using Cambridge's unique collection of real exam candidates' answers， the Cambridge English Corpus。 A Student's Book without answers is also available。