单选题 The size of the audience, ______ we had expected, was well over one thousand.
A. whom B. who C. as D. that

【正确答案】 C

【答案解析】[解析] as we had expected正如我们所预料的那样，有的语法书将as分析为关系代词，代替主句所谈的情况，这样用的as从句既可以放在主句之后，也可以放在主句之前，但作关系代词用的that/which/who只能放在先行词之后。