The patient was warned oily food after the operation.
A. t o eat not
B. eating not
C. not to eat
D. not eating
网友回答
A. t o eat not
B. eating not
(答案→)C. not to eat
D. not eating
解析：这题考查不定式的否定式：not to do，warn sb not to do“警告某人做”，句意是：病人被警告手术后不要吃油腻食物。选C。