A sentence has been given in Active/Passive voice. Out of the four alternatives suggested below, select the one which best expresses the same sentence in Passive/Active voice.

We waste much time on trivial things.

Much time was wasted on trivial things.  Much time will be wasted on trivial things  Much time is wasted by us on trivial things.  Much time is wasted on trivial things.

Much time is wasted by us on trivial things.

This sentence is in the passive voice, and the tense and verb agree with the subject.