—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 + 動詞+ed形式”表示“本來不應該做某事”。根據(jù)所提供的情景My cat’s really fat.可判斷出本來不應該給它那么多食物�！癱ouldn’t have + 動詞+ed形式”表示“不可能”�！皐ouldn’t have + 動詞+ed形式”常用于表示非真實情況。mustn’t不與have + 動詞+ed形式連用。
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