他对公司的忠诚从未受到质疑。

His ___loyalty to the company was never in question.

她因对这项事业的坚定忠诚而受人敬佩。

She was admired for her unwavering ___loyalty to the cause.

狗对其主人的忠诚是毋庸置疑的。

A dog's ___loyalty to its owner is unquestionable.