I only solved the first part and kept it as is. There are two pages with stains on the main body, as shown in the third image. There are no other stains. Answer key included. [Overview of Educational Materials] This book is a workbook for English and Mathematics for first-year high school students. It covers a wide range of topics from basic to advanced, and includes features designed to enhance learning effectiveness. [English Problems] The English problems are structured around grammar and vocabulary, with many practical exercises. In particular, there are many conversational passages and content related to daily life, allowing students to develop practical English skills. [Mathematics Problems] The mathematics section includes problems ranging from basic calculations to advanced applications, enabling students to progress through their studies step by step. The explanations for the problems are also comprehensive, aiding in deeper understanding. - Title: First-Year High School English Mathematics - Class Name: KK-K1-H004 - Content: English Workbook - Publisher: Rinkai Seminar Thank you for viewing.