45 sets of questions are better. Tian Li's special training is better. Also, 45 sets of questions are generally selected from the province, and 38 sets of questions seem to be selected from all over the country, including Shanghai. If you have a weak foundation, don't buy Tian Li's math problems. It's too difficult. Personally, I think 45 sets are more suitable for you. The understanding of a person with college entrance examination experience is for reference only.