Matching Pairs Passive useOnline version Match the uses to the examples by Janssens Joyce 1 Mistakes were made. 2 An experimental solar power plant will be built in the Australian desert. 3 The cave paintings of Lascaux were made in the Upper Old Stone age. 4 Insulin was first discovered in 1921 by researchers at the University of Toronto. It is still a treatment available for diabetes. 5 Rules are made to be broken. The actor is irrelevant. The actor is unknown. You want to emphasize the person or thing acted on. You want to be vague about who is responsible. You are talking about a general truth.