Grammar: Lai Shixiong's English grammar masterpieces, etc.
True questions: Huayan English "Guide to the Test of True Questions in CET-4" and Micro-English "Explaining True Questions in CET-4 sentence by sentence" and so on.
As far as vocabulary is concerned, vocabulary is the most basic preparation for the review of CET-4 and CET-6. It is suggested that the disordered version should be memorized with root affixes, which is more scientific. Memorizing words is an essential step in preparing for any English exam, and memorizing words is also very particular. Anyone who has passed CET-4 or CET-6 knows that there are only a few hundred real core words, and they are also the core words that appear repeatedly in the real questions in previous years.
Grammar, if your foundation is not very good, you can learn grammar systematically, which is of great help to the composition of CET-4 and CET-6. If you have a good foundation, you can actually buy grammar books in no hurry. Just listen to the teacher's recommendation and buy it.
If you want to learn CET-4, you must buy real questions. The real question is the question of Band 4 in the exam twice a year. The questions we have tested in the past are very important for the directional guidance of our review. Although CET-4 has been reformed, it is still a standardized test, and the vocabulary and questions of real questions are familiar over the years. It's no problem to pass Band 4.
Generally speaking, it is not difficult to pass CET-4 and CET-6, as long as you prepare carefully.