We did not expect the plan we had made very carefully for them so coldly.
A. refused
B. to refuse
C. to be refused
D. refusing
网友回答
A. refused
B. to refuse
(答案→)C. to be refused
D. refusing
解析：这是一个except+宾语+不定式的句型。本句中的宾语是plan，其后加了一个较长的定语从句，空白处为不定式，从句中看只有用其被动形式才合句意。