For example, the school usually subscribes to the Century Gold List or English Weekly. It is enough to read carefully and do exercises.
Of course, in order to prepare for the college entrance examination, I can buy books that systematically introduce English grammar: Five Years of College Entrance Examination for Three Years, Spark English Grammar Understanding and so on. Carefully choose what you like (reading content, typesetting, etc. ), and a book is enough. Usually, when the teacher takes notes in the lecture, is there this knowledge point in the book? If not, you can simply summarize it and write it down in this book for review during the exam. Use it as a reference when doing exercises.
After class, especially on weekends, go to the library or find a way (online: Pute English, Want Want English; Watch CCTV-NEWS) read English books, articles, listen to English listening and so on.