Be sure to finish reading the book first, and do all the questions in the book twice, leaving no place. You must first grasp the basics, and you may get high marks in the exam. You must read this book more than twice.

To master a book thoroughly and do it again and again, a workbook has been done four or five times, and later it becomes more and more convenient. Remember to mark the key points and difficulties when you do it the first time, so that the next review will be focused and save time!

It is not recommended that you publish a large number of books. It is enough to make two comprehensive books.