Study reference book allowing easy confirmation of correct answers

A study reference book, comprising:

• question pages, each comprising question items to evaluate learning content, multiple choice answers related to each question item, an answer-marking part on which a correct answer of each question item is marked, and correct answer-punctured spaces for a previous question page to indicate a correct answer of each question item in the previous question page on the answer-marking part of the previous question page;
• explanation pages, each being positioned at an opposing side of an associated question page when the study reference book is open, and comprising explanation items to enhance understanding of the question items, and a correct answer-punctured space positioned to locate correctly at a correct answer-indicating space of the answer-marking part in an associated question item of the question page when leafing the explanation page leftward to overlap the question page;
• and
• a securing member to secure the pages such that the question page, and the explanation page are sequentially opened when leafing the pages.