Exercise: rewrite the sentences in the passive form;
e.g.: The cat kills the mouse
The Queen welcomes the guests.
My son cleans the window.
The mouse is killed by the cat.
Soldiers repair the bridge.
The new students ask a lot of questions.
A dog bites the boy.
The nurse examined the patient.
Our daughter drove the car
The noise frightened the children.
Fire destroyed the building
Christopher Columbus discovered America in 1492