Question

1)you did not keep your promise 2)you have not helped in this matter 3)one should do one's duty 4)keep your city clean (change the voice)

Answer 1

Ans : May be
(1) Your promise was not kept by you.
(2) In This matter have not been helped by you.
(3)One's duty should be done by one.
(4) Keep your city clean .