John such a thing about you. He never speaks ill of you behind your back.
A. can’t have said
B. might not have said
C. couldn’t say
D. mustn’t have said
网友回答
(答案→)A. can’t have said
B. might not have said
C. couldn’t say
D. mustn’t have said
解析：考查情态动词表推测的用法。Can表示推测用于疑问句或否定句中，can have done 是对过去事情的推测，句意：约翰关于你他不可能说那样的事。他从来不在你背后说坏话。所以选A。