I'm using only one sheet of the answer sheet, cut out from the book. The remaining three sheets are unused. There is no writing on them. For each answer, there is a "selection rate" displayed, showing the percentage of people who chose A, and the correct answer was A, and so on. If I chose A and the answer was B, and the selection rate for A was 70%, I can understand that it's a problem that many people tend to get wrong. Conversely, if the selection rate for A was 10%, I can judge that it's a problem that everyone understands, but I don't. There are explanations and these selection rate displays for all 600 questions across three tests. I used many inexpensive textbooks to practice doing the problems repeatedly while timing myself. Please feel free to continue using it. "TOEIC Test Ultimate Mock Exam 600 Questions" ALC Press Editorial Department Price: ¥2600 #ALC Press Editorial Department #Book #Language/English