Key to High School English Grammar & Comp (M. E. ) by P. C. Wren, H. Martin carries solutions to all the exercises from High School English Grammar & Comp (M. E. ). The answer key can help you check and gauge how much you have learnt from the former book. Key to High School English Grammar & Comp (M. E. ) by P. C. Wren and H. Martin provides a comprehensive list of solutions to all the exercises and unsolved examples in High School English Grammar & Comp (M. E. ) by the same authors. The key is sure to be extremely useful while checking how you've solved the exercises in the former book. This book is as frequently bought as the main one. The answer key will help you single out and focus on the areas where you haven't performed well. The textbook to this answer key is one of the foremost books written on English grammar and is widely considered as every Grammar Nazi's bible.