语法与词汇 5.Unfortunately, his damaging attacks on the ramifications of the economic policy have been______ by his wholehearted acceptance of that policy's underlying assumptions.
【正确答案】 B
【答案解析】本题考查动词辨析。A项“增补，补充”；B项“暗地里破坏，削弱，挖……的下面”；C项“救赎，赎回，弥补”；D项“转移，释放”。空格应该填入个动词的过去式，来表示他对于经济政策的猛烈抨击。句意为：不幸的是，他对这个经济政策的后果所做的猛烈抨击的效果，由于他对这政策基本假设的衷心接受，而被(削弱)。因此答案为B。