(2013·湖南高考)You cannot accept an opinion to you unless it is based on facts.
A. offering
B. to offer
C. having offered
D. offered
网友回答
A. offering
B. to offer
C. having offered
(答案→)D. offered
解析：选D offer与逻辑主语an opinion之间为被动关系，A、B、C三项都表示主动，D项为过去分词表示被动， 故选D项。