`1,` Letters are typed by Mary in the office.
`2,` You will be helped by his father tomorrow.
`3,` The human life has completely been changed with science and technology.
`4,` This bottle was broken by Peter.
`5,` English is being learned in the room.
`6,` My mind can’t be changed.
`7,` I hadn’t been told about it.
`8,` Her telephone number isn’t known by me.
`9,` The children home will be brought by my students.
`10,` I was sent a present last week.
`11,` More information was given to us by her.
`12,` All the workers of the plan were being instructed by the chief engineer.
`13,` Tea can't be made with cold water.
`14,` Some of my books has been taken away.
`15,` The meeting will be held before May Day.
