Answer:
The room was being cleaned by them when I came yesterday.
New machines were ordered by the company.
This bottle was broken by peter.
English is being learned by them in the room.
My mind can be changed by nothing.
I was told by no one about it.
2 newspapers and 1 magazine are bought by me everyday.
The children will be brought home by my students.
The room should be kept tidy by us.
We were given more information by her.
All the workers were being instructed by the chief engineer of the plan.
Many flowers are planted in the garden by us.
Explanation:
To change active to passive voice, you should take the person doing the action and put it where the receiver of the action would go, then take the receiver of the action and put it where the doer of the action was
I pet the dog. -> The dog was pet by me.