Green card books, or other portable books, are generally the standard vocabulary and vocabulary required by the syllabus. However, I personally suggest that you bind a portable book yourself, read the glossary attached to the textbook first, copy down the black inscriptions (keywords) and corresponding meanings, and attack page by page. The specific way is to recite it a few times first, then find something to cover up the Chinese meaning and ask questions yourself, and repeat it in different times. If you want to cope with the college entrance examination, you don't have to memorize all of them, just know most of them. Then buy a dictionary (preferably related to the college entrance examination, excluding common meanings), do a lot of papers, just look up what you don't know, don't bother at first, then copy it down and attack page by page. Same as above, be sure to review what you have memorized. My classmates and I both think that the foundation is extremely poor, but we have made rapid progress in this way. Feel for yourself and experiment for yourself. You can try, but confidence is very important!