"She finishes writing the letter."
Translation:Ela termina de escrever a carta.
It would have been nice if the hint mentioned that we needed to add "de" after the verb terminar
It is also acceptable, but most of time we use acabar+de + infinitive meaning have+just+participle
i've never seen "terminar" used with "de" before, so is there a rule in this case that i am missing?