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