I’m sorryI at you the other day．- Forget it．I was a bit out of control myself．A.

问题补充：

--- 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

答案：

A. shouldn’t shout

(答案→)B. shouldn’t have shouted

C. mustn’t shout

D. mustn’t have shouted

解析：shouldn’t 不应该mustn’t 禁止根据题意，对不起，那天我不应该对你大喊。——算了。我只是有点控制不了自己。可知上文叙述的事情已经发生，故选B。