——How much vinegar did you put in the soup?
——I’m sorry to say, . I forget.
A. no
B. no one
C. nothing
D. none
网友回答
A. no
B. no one
C. nothing
(答案→)D. none
解析：本题考查不定代词的本意区别及其与语境综合运用。此处none指的是not any vinegar，也就是说，此处可以这样理解：I’m sorry to say that I didn’t put any vinegar in the soup, because I forgot it.