surprised me most was  （）      he was too late for the important meeting, for he was chairman of it.

题目解析 答案：A 解析：这是一个主语从句的题目。句子结构是"The thing that surprised me most was..."，在从句中缺少一个连接代词来引导主语从句。选项A中使用了"What"来引导主语从句，表示"让我最惊讶的是什么"，是符合句子意思的正确答案。