–With the final examination approaching, I’m getting anxious. As a consequence, I have no appetite for anything and even can’t fall asleep. -- Don’t worry. Things will pick up if you ____ yourself.
---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 D. mustn't have shouted