Hehe, I know this. Are you from Nanchong Vocational and Technical College? I attended several meetings. In fact, we all have the answers to the construction workers' exams in Sichuan (most people have doorways, so you will know when they take the exams). If the most convenient thing for students at school is to register at school, and you are a major, you can take the exam at school. Before the exam, the school will issue two workbooks, and 90% of the questions in the exam are in those two workbooks. As long as you finish the workbooks, it will be basically stable.