My professor discussed with me my written report. It was filled with red marks. I looked at his pen and it was an expensive one. I worried that he might use up all his ink. After explaining to me everything, I couldn’t help but tell him, “Sir, I hope you didn’t use up all the ink of your pen writing and checking all of these :)”
He laughed…and agreed. Next time, maybe it’s better to use pencil in checking my paper. 🙂