Gap-fill exercise: fill in the gaps with the subject.

Active voice	Passive voice
The pirates ask for a ransom.	is asked for by the pirates.
deal with the issue of bullying.	The issue of bullying is dealt with by many schools.
The nurse looked after the children.	were looked after by the nurse.
attended to all his needs.	All his needs were attended to by the middle-aged landladies.
John has paid for the drinks.	have been paid for by John.
Someone has waited for you impatiently.	have been waited for impatiently.
had spoken to the families.	The families had been spoken to by the Head.
Someone will look at the report.	will be looked at.
will cope with the problem.	The problem will be coped with by modern techniques.
were caring for him.	Simon was being cared for by his parents.
We can think of light as both a particle and a wave.	can be thought of as both a particle and a wave.
We may think of a force as a push or pull in a specific direction.	may be thought of as a push or pull in a specific direction.