Question

what is to be done( change into voice )​

Answer 1

Active Voice refers to a sentence in which the subject is performing the action.

Passive Voice refers to a sentence in which the subject undergoes the action. In other words, it is writing the sentence in reverse order.

Example: Kyle is visiting my parents. (Active)

               My parents are being visited by Kyle. (Passive)

NOTE: Sentences that convey habitual actions cannot be changed to passive mode.

What is to be done? (Passive)

What to do? (Active)

Answer 2

The answer is: What to do?