Notre professeur est une personne sincère, donc je me fie à lui.

Sentence Discussions French
#1
English Translation

Our teacher is a sincere person, so I rely on him.

se fier à

  1. [avoir confiance en] = to trust (in)
  2. [compter sur] to rely on
    se fier à sa mémoire = to rely on one’s memory
    © Larousse 2014