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—My cat’s really fat.
—You _______ have given her so much food.
A.wouldn’tB.couldn’tC.shouldn’tD.mustn’t
C
“shouldn’t have + 动词+ed形式”表示“本来不应该做某事”。根据所提供的情景My cat’s really fat.可判断出本来不应该给它那么多食物。“couldn’t have + 动词+ed形式”表示“不可能”。“wouldn’t have + 动词+ed形式”常用于表示非真实情况。mustn’t不与have + 动词+ed形式连用。
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