I used to live selfishly, I should admit. But one moment changed me. I was on my lunch break and had 41 the office to get something to eat . On the way, I 42 a busker(街头艺人),with
--- I’m sorry. I ___________ at you the other day.--- Forget it. I was a bit out of control myself. A. shouldn’t shout B. shouldn’t have shouted C. mustn’t shout