答案选 B,as。as引起让步状语从句时,意思是"虽然",句子需要倒装。倒装的做法通常有四种:1,名词做表语提前,如:Child as he was, he could speak two languages. 2, 形容词作表语提前,如:Sad as he was, she smiled to them_ 3, 部分谓语动词提前,如:Try as you might, you could not succeed. 4, 副词提前,如:Hard as you work, you can't support your family. 你的这个题目属于第二种,形容词作表语提前。