You cannot accept an opinion to you unless it is based on facts.(2013·湖南，29)
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：
考查非谓语动词的用法。句意为：除非观点是建立在事实基础之上，否则你不能接受别人的观点。分析句子成分后可知，“ to you”是分词短语作后置定语修饰opinion，而opinion和动词offer之间是被动关系，所以用过去分词。