Sobre a frase ''The opportunity was given to me''

Olá!

Houve duas frases que não consegui entender o gabarito.

As partes das frases que estão em negrito e em itálico que deveriam ser passadas para a voz passiva.

I was very grateful to the fire service for giving me the opportunity.

Eu achava que deveria ser: the opportunity was given to me by the fire service.

Porém, o gabarito diz:

To be given the opportunity by the fire service / for being given the opportunity by... / for having been given...

Outra frase:

Above all, firefighters need to be calm. It's easy for the situation to overwhelm you.

Eu achava que deveria ser: you were overwhelmed by the situation.

Porém, o gabarito diz:

To be overwhelmed by the situation

Anyone? Please, help!