habían impresionado
Past perfect ellos/ellas/ustedes conjugation of impresionar.

impresionar

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En todos los programas, al terminar la emisión, se radiaban los extractos de los himnos que se habían impresionado especialmente en un disco que se facilitaba a las emisoras con esa finalidad.
The extracts of the hymns, which had been especially recorded on a record that was provided to broadcasting stations for this purpose, were broadcasted at the end of all programs.
Word of the Day
to purr