Written Answer
They clean the house in the mornings.
The house is cleaned in the mornings.
Computer equipment is sold in this store.
(They) sell computer equipment in this store.
The mayor signed the letter.
The letter was signed (by the mayor).
Radium and polonium were discovered by Marie Curie.
Marie Curie discovered radium and polonium.
Ms. Rogers published some new books.
Some new books were published by Ms Rogers.
English is spoken around the world.
People speak English around the world.
We will study passive voice next week.
Passive voice will be studied next week.
Special items cannot be returned.
(You) cannot return special items.
We have spent all of our money.
All of our money has been spent.
The picture has been sold for $7,6 billions.
(They) have sold the picture for $7,6 billions.
ESP has taught English for many years.
English has been taught for many years at ESP.
Thousands of houses had been bought before the crisis.
People had bought thousands of houses before the crisis.
She is eating all the fruit.
All the fruit is being eaten.
This song was being played when the accident ocurred.
(Someone) was playing this song when the accident occurred.
I was taking a picture before the earthquake.
The picture was being taken before the earthquake.
The shop was being cleaned.
(Someone) was cleaning the shop.