The entire range of science in the second year of junior high school, 405 questions of choice. It is a full-scale learning app by the author who also provides questions used for classes and exams to cram schools and junior high schools. It contains all the essential items and important items of each unit, and it focuses on basic questions that are perfect for textbooks, so it can be done in a short time and is ideal for checking before regular tests. In addition, commentary on all issues can