Question

3. (2015广东深圳文汇中学期中）一What's wrong with her? ―She_her mistake until I told her.

A.didn't want B.realize C.was unaware of

Answer 1

. C句意:一她怎么啦？一一直到我告诉她，她才察觉自己 的错误。表示"未察觉"，用be unaware  of。