Help with Pronouns?

Question

I have this sentence and a list of pronouns to choose from:

Su madre mandó la carta _______ correo.

The list of pronouns to choose from to fill in the blank are: a con de desde durante en entre hacia hasta para por según sin sobre tras

I already tried en, de, and a, but it's none of those. Any ideas?

Answer 1

I think it's 'por correo'.

Thank you. I think you're right. That makes sense. : ) - PoppyPatch, Sep 12, 2012

Answer 2

First of all, pml222 is correct. "por" is correct.

• On the other hand, a, ante, bajo, cabe, con, contra, en, entre, hacia, hasta, para, por según, sin, so, sobre, and tras, are not pronouns, they are prepositions .
• Su madre mandó la carta por correo