Hi Yolanda GuerreroRebollo,
The sound options in Cinema 4D have been reduced in the past years, with no Loudspeaker/Microphone options anymore, for example.
The sound file you like to use needs to be edited to the length required for the project in an external audio editor, such as Aftereffects.
(There is a Sound Node in XPresso, but that is not useable from my point of view, as it keeps continuously playing, for example, while the time loops.)
If you have zero options and just one file, I can certainly help. Just let me know.
All the best