---I’m sorry. I ______ at you yesterday.
---Forget it. I was also a bit out of control myself then.A.shouldn’t shoutB.mustn’t shoutC.shouldn’t have shoutedD.mustn’t have shouted
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C解析考查虚拟语气。句意：对不起。我昨天不应该对你大喊大叫的。——算了吧！我那时也是有点控制不住自己。“shouldn’t+have+done”表示本来不应该做某事，而实际做了。含有指责对方或自责的含意。故选C。