Question

I don't know (change the voice)​

Answer 1

Answer:

It is not known to me.....

just have a look carefully here

the sentecnce says that 'i dont know' means someone is saying that "he doesn't know. "

so the change in voice must be something which is not known to him.

so ans will be It is not known to me.

Hope it helps mate..

Answer 2

Answer:

it is not know to me. i think soo