Question

one should keep one's promises ​

Answer 1

Answer:

TRUE ONE SHOULD KEEP HIS WORD

I AGREE WITH YOU

Answer 2

$\huge{\mathtt{\purple{A}\green{N}\pink{S}\blue{W}\purple{E}\green{R}\pink{!}\blue{!}}}$

Promises should be kept.

Extra Information :

The auxiliary 'be' should be placed between the modal and the past participle form of the main verb in the passive form.