问题补充：
— Mary’s got mad and has been sent to the mental hospital. Did you tell her boss about that?
— Yes, but I her husband first.
A. should have told
B. shouldn’t have told
C. must have told
D. needn’t have told
答案：
(答案→)A. should have told
B. shouldn’t have told
C. must have told
D. needn’t have told
解析：考查should与动词不定式的完成时连用的含义。should have done表示本来应该做而实际上没做，shouldn’t have done表示本来不该做但实际上做了。从本题have told her boss可知没有先告诉她先生，但应该告诉的，因此选A
