English is necessary, because there will be English classes. My experience and lessons are as follows. You'd better review your English. Assigned to the fast class, one English textbook is missing, and the second year of high school takes an examination of listening and oral writing, etc. The teachers in these exams are all behind the scenes, giving about 90 points (as far as I know, only one teacher is fair). These are just unfair to children in slow classes.
On the other hand, it is relatively difficult to take the exam before sophomore year, but they have the strength to get in, which is not a problem.
Some colleges have to be divided into an excellent class or a master class, and they have to take math exams.