Question

it is time to accept the challenge change in to passive voice​

Answer 1

Answer:

It is time for the challenge to be accepted

It is time for the gates to be shut.

Rule : It is time + for + object + to + be + Verb (3rd form)

EX: Active: It is time to close the door

Passive: It is time for the door to be closed.

Am I clear? Hope, you will understand.

Answer 2

Answer:

It is time for the challenge to be accepted.