While there are highlighted lines on some pages of the introductory "Trends and Countermeasures" section, I have confirmed that there are no markings or lines on the question and answer sheets. However, please understand that there is a possibility of oversight, and I would appreciate it if you could accept this. (No returns or exchanges) Regarding shipping, due to frequent business trips, it may take up to a week depending on the timing. Thank you for your understanding.