题目内容

Oh，I'm not feeling well in the stomach.I ________ so much fried chicken just now.
A．shouldn't eatB．mustn't have eaten
C．shouldn't have eatenD．mustn't eaten
C

just now是表示过去的时间状语。情态动词在表示过去发生的事时，必须用“情态动词＋have＋过去分词的形式”。所以只能在选项B或C中确定答案。mustn't have eaten是一个错误选项，因为“mustn't＋动词”表示“禁止”，不表示判断或推测。
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