◎ 题干
New ideas sometimes have to wait for years before _______.
[     ]
A. being fully accepted      
B. fully allowing  
C. having fully accepted      
D. fully allowed
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“New ideas sometimes have to wait for years before _______. [ ]A. being fully accepted B. fully allowingC. having fully acceptedD. fully allowed…”主要考查了你对  【动名词的被动式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。