Workbook (with Answer Key) Includes extensive reinforcement and extension activities for the grammar and lexical syllabies as well as complete reading, writing and listening strands in context, Revision units, Self-Evaluation tests, and CEF “Can do” checklists. Student Audio CD Includes all Reference Guide and Workbook audio material. Student CD-ROM Provides ample opportunities to reinforce and extend unit content with interactive grammar, vocabulary, reading and listening activities, with video clips.