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.