[单选题]Even without knowing what was in the messages, the knowledge of who sent them and to whom was enormously revealing and still could be.请问划线部分是什么句子成分( )。 A 定语从句 B 表语从句 C 宾语从句 D 状语从句 是什么 句子成分 发布时间:2024-06-18 08:26:42