You would have helped your mother do some housework. But you ____.
A．don’tB．didn’tC．wouldn’tD．weren’t
B
would have done 表示與過去事實相反的假設(shè)，連詞but引出一個過去的事實。故此處用一
般過去時，完整的句子為But you didn’t helped your mother do some housework
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