The Workbook consists solely of self-study exercises, with answers included, providing students the opportunity to explore and practice grammar independently. It is keyed to explanatory grammar charts in both the Student Book and the Chartbook.
Understanding and Using English Grammar is a classic developmental skills text for intermediate to advanced English language learners. Это и многое другое вы найдете в книге Understanding and Using English Grammar: Workbook: Volume A (Betty S. Azar, Rachel Spack Koch, Stacy A. Hagen)