Change the voice: Promise Should be kept.
ক
One Should keep promises.
খ
One Should keep one's promises.
গ
Promise should keep.
ঘ
None of them.
সঠিক উত্তর: One Should keep one's promises.
সাধারণত One, No one, Nobody, Everyone, Everybody, ইত্যাদি Indefinite pronoun গুলো Passive voice এ উঠে যায়।