The diagnostic test is desígned to help you identify specífic problems you may have with how you use English. After you answer the 99 questíons, check your answers in the key. How you do in each sectíon will tell you where to look in the book to improve your specífic problems. You may find some questions easy, but ítis good to review the basic reasons behíndthem as well. Even if you know the correct answer, it is ímportant to be sure that you know WHY it is correct! Good luck! You are on your way to correctíng the most common errors made in English.