Thank you for looking. I was so bad at chemistry that I ended up taking only biology for the second-stage science exam halfway through, so some pages are solved and marked with checks where I made mistakes. (I probably only solved the A questions once because I used chemistry for the common test.) The book itself is very clean and includes the practice problems, explanations, and a pre-exam review. It would be a waste to throw it away when it's barely been used, so I hope someone can use it. Thank you!