The surprise attack in junior high school is still very effective. I have a classmate who made a surprise attack last March and finally entered high school as an index student. I think we should practice more basic and intermediate questions, because there won't be too many difficult problems. I don't think the result will be very good if you attack the problem in the last two months. Focus on the basics and intermediate levels, so that you have the energy to surprise the problem. After all, exams are not just math.