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