Verb conjugation of "fermentar" in Spanish

The machine arrived in Cuba at nine and it was already dark. The border control was nothing like the one in Mexico. They were communist and one could see the strictness and uneasiness of them.
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
The fans in the stadium was so much better than any fans in Europe. The atmosphere was pure football and people did not stop singing for ninety minutes regardless of the score. Outside the stadium there was smell of Asado.