It depends on your own foundation whether it is necessary to take a remedial class to take the joint exam. If you have a good foundation, there is no need to take remedial classes. You can review for the exam yourself, and there are a lot of online materials. If you have a poor foundation and haven't touched a book for many years, you can make up lessons if you are afraid of failing the exam. Most school teaching stations have remedial classes, and many needles are given to your students for free.

It is not easy to take the adult college entrance examination. If candidates really don't have time to review, the best way is to make up lessons. Through pre-test training, concentrated review and face-to-face teaching by famous teachers, students can answer questions and let them choose their study time freely according to their own situation. After all, we are all human beings, not gods, and it is not feasible to play exams without foundation for too long. I hope the answer can help you.