21. --- I’m sorry, but 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
22. --- I’m really angry at Tom. He never listens to me.
--- ______, Ellen. Things will work out.
A. Don’t mention it B. I don’t think so C. Take it easy D. No problem
