There are only indefinite multiple-choice questions and true-false questions, totaling about 30. The answer can be found online. It's simple. Choose three subjects before the exam, then listen to the content in the video and take the exam after learning. Let me tell you a simple method. When you hang up, you can open three web pages at the same time, each with a theme, and it will be over in 3 hours. You don't have to hang up for 24 hours.