第20题: [单项选择]______ they have boldly undertaken the construction of a 26 storied: building. A. As they are young B. Young as they are C. They are as young D. As young as they are 参考答案:B 答案解析:as作为从属连词引导让步状语从句时,从句一般要求倒装,即将形容词或分词提到从句前,B符合这一要求,将其置入空当中,句子内容讲得通,因此B为正确选择。C和D置入空当中,句意都不通,因此均可排除。题意为: