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是表示過(guò)去的時(shí)間狀語(yǔ)。情態(tài)動(dòng)詞在表示過(guò)去發(fā)生的事時(shí)，必須用“情態(tài)動(dòng)詞＋have＋過(guò)去分詞的形式”。所以只能在選項(xiàng)B或C中確定答案。mustn't have eaten是一個(gè)錯(cuò)誤選項(xiàng)，因?yàn)椤癿ustn't＋動(dòng)詞”表示“禁止”，不表示判斷或推測(cè)。
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