他有礼貌地为自己的错误道歉。

He had the ___grace to apologize for his mistake.

她以微笑接受反馈，表现出极大的礼貌。

She showed great ___grace by accepting the feedback with a smile.

他在艰难对话中的礼貌令人钦佩。

His ___grace in difficult conversations is admirable.