The emergence of social networks on the Internet is being hailed by some as an innovation (i) ______ and (ii) ______ the concept of community; yet others criticize such institutions as (iii) ______ substitutions for old-fashioned human interactions.

【正确答案】 A、D、I
【答案解析】

Blank(i)和Blank(ii)处的词语与“innovation”形成呼应,因此表达的意思应该相近,而obliterating(清除,消灭)不符句意,promoting没有表达出“innovative”的含义,因此 “revolutionizing” 最符合Blank (i);相应地,Blank(ii)处,“expanding”也表达出了“the idea of positive growth and change”,maculating的意思是“使有污点”,assuaging意为“缓和,减轻”,均不符合句意,因此选择D项。第二个分句与第一个分句形成对比,即“contradicts the positive view of social networking sites”,因此inadequate最符合句意。Gregarious 社交的,群居的;orthodox 正统的,传统的。