---Mary had a traffic accident and has been sent to the hospital. Did you tell her boss about it?---Yes, but I _____ her husband first.A.should have toldB.shouldn’t have toldC.must have toldD.needn’t have told
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A解析情态动词用法辨析。A本应该做某事，实际上却没有做；B本不应该做某事，实际上去做了；C一定做了某事；D本不必要做某事，实际上却做了。结合句意可知A正确。句意：—Mary出了事故被送到医院了。你有没有告诉老板？—是的。我已经告诉了老板。但是我本应该先告诉她丈夫的。