—— I didn’t see her yesterday.
—— Oh, but you ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿.
A. must have
B. ought to
C. should have
D. cannot have
网友回答
A. must have
B. ought to
(答案→)C. should have
D. cannot have
解析：should／ought to have done表示“本来应该做的事而事实上并未做”。根据上下文，句中省去了seen her。