conscience

当她意识到自己的错误时，感到一阵强烈的良心不安。

She felt a sharp pang of ___conscience when she realized her mistake.

那次事故后，他多年来一直备受负罪感的折磨。

He was tormented by a guilty ___conscience for years after the accident.

即使多年以后，她仍为自己说过的谎话而感到良心不安。

Even years later, her ___conscience was troubled by the lie she had told.