It is best to do exercises in the middle of the book, or try the whole product. To simulate three years of college entrance examination for five years. No matter whether the foundation is good or not, buy it. In fact, the college entrance examination questions will not change much, and the teachers who gave the questions don't want to be remembered forever. However, I suggest that you look at the knowledge part with a large range of knowledge, such as the examination of test questions. Questions can also be done, just like magazines, not much, often less than once a month. ...