Oh, I'm not feeling well in the stomach, I ________ so much fried chicken just now．
A.shouldn't eatB.mustn't have eatenC.shouldn't have eatenD.mustn't eat在线课程C
解析：
由just now而知，本题谈论过去之事。谈论过去之事，在should或must之后接不定式的完成式。must表示推测只用于肯定句中，shouldn’t have done表说话之前本不应该做某事，但事实上却做了，含有责备的口气。