Be sure not to spend most of your English studying time in reciting words. You will forget them sooner or later if you don’t use them, including listening, speaking, reading and writing. I learned the band5 and band6 textbooks by myself and passed CET6 at first time.
In fact we don’t classify the Chinese words, which are much more complex than English words. CET6 is not so difficult. Don’t worry.
Try it and good luck!
