This is a set of three books: 2024, 2022, and 2020. Individual sales are not possible. *Please refrain from price negotiations. (We will decline even if you leave a comment.)* **[2024]** There were some faint pencil markings on some pages, but the seller has erased them all. I feel that there is almost no impact on the exercises. There is no use of ballpoint pens or fluorescent markers. **[2022]** There are pencil markings on some problem pages. Because the pressure was somewhat strong and the number of pages is large, I gave up erasing them with an eraser. (= Cannot be used for exercises) The target year and subjects are listed below, so please check them. There is no use of ballpoint pens or fluorescent markers throughout all pages. *Year and Subjects with Markings* February 8th and 9th, 2021 → English, Japanese, Biology February 8th, 2020 → English **[2020]** There were some faint pencil markings on some pages, but the seller has erased them all. I feel that there is almost no impact on the exercises. There is no use of ballpoint pens or fluorescent markers.