New ideas sometimes have to wait for years before .A. being fully acceptedB. fully accepte

网友回答

(答案→)A. being fully accepted
B. fully accepted
C. fully accepting
D. fully being accepting
解析：B有较大干扰性。before为介词，而并非连词，因此后面用动名词，ideas与accept有逻辑上被动关系，因此本空用动名词被动语态。