Making another entry in my big book of reasons to be annoyed at Português em Foco.
Here’s the model for one of the idiomatic expression questions:

And after three attempts at answering the question, this is the correct answer it gave me

Obviously “á frente” in the model is a cockup, for a start, because á doesn’t exist, but swapping the order of frente and atrás too… Tsk tsk… Very bad form, old chap.