* Yo llegué a un lugar nuevo cuando fui de vacaciones el mes pasado.
Explanation:
Because the sentence indicates actions carried out in the past tense, therefore we must identify the narrator, the gender and number in the sentence to conjugate the verb logically and have agreement with what is expressed.
Reflexive verbs take different pronouns depending on who is doing the action. In this instance you know “ponerse” is reflexive as it ends in “se”. Yo me pongo la ropa.
