If you buy Chinese, buy reading books or something. Mathematical physics: You can consider that "Winning in the Sunshine" has an analysis of every question, which is very comprehensive, with unit papers and special topics, which is not bad. For English, students are advised to buy a cloze, reading and composition. If they master the basics, they can buy a variation of vocabulary and sentence patterns, or buy a unit paper for vocabulary and sentence patterns, reading and composition.