问题补充：
—— I didn’t see her yesterday.
—— Oh, but you ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿.
A. must have
B. ought to
C. should have
D. cannot have
答案：
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。
—— I didn’t see her yesterday. —— Oh but you ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿. A. must haveB. ought toC. s
