【正确答案】 D

【答案解析】[解析] as和although均可连接让步状语从句，表示“尽管”。as引导的让步状语从句要求用倒装结构，此结构可提至句首的有名词、动词原形、副词、形容词等，注意可数名词单数形式提至句首时不用冠词。如：Child as he ism, he knows a lot. (名词前置)/Dark as the night was, he still found his way to my home. (形容词前置)/Try as he would，he couldn"t open the door.(动词前置)。although无此用法，如果用although的话，应该是Although he likes her very much。