The Workbook contains a wide variety of practice exercises that review all the language areas studied in the Students' Book:
This edition contains the Key.
Free audio resourcesFree audio resources for the Cutting Edge series are available online at the English Portal.
Simply complete your request via this link and create your account for the English Portal. Once your account is active you'll find the Cutting Edge free resources are accessible in your English Portal account.
Buy Cutting Edge 3rd Edition Elementary Workbook with Key by Sarah Cunningham from Australia's Online Independent Bookstore, BooksDirect.