
yo diría:
fue desconocida -> se desconocía
o
fue desconocida -> era desconocida

A mí, me suena mejor: "Se desconocía la causa del incendio." ¿Qué os parece?
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This sentence was initially added as a translation of sentence #758076
added by Zifre, February 17, 2011
linked by Zifre, February 17, 2011
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linked by Demetrius, February 17, 2011
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linked by arcticmonkey, February 20, 2011
linked by arcticmonkey, February 20, 2011
edited by Zifre, February 3, 2012
linked by Amastan, June 30, 2013
linked by marafon, February 26, 2023