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as, what, that, whom, was, were
The size of the audience,____ we had expected,____ well over twenty thousand.
【正确答案】：as;was
【题目解析】：【考点点击】本题考查as的用法和主谓一致。【要点透析 as we had expected是as引导的非限制性定语从句,as指代主句的内容。由于主语是 The size of the audience,所以谓语动词用单数形式。