I don’t know why he is late.
—Nor do I.He an accident.
A. could have had
B. should have had
C. might have had
D. must have had
网友回答
A. could have had
B. should have had
(答案→)C. might have had
D. must have had
解析：may/might have done表示对过去发生情况的可能性推测。