"Are you calling your mother?"

[gpbalis]

I wrote "καλειτε την μητερα σας?" and was marked wrong.

Are we not using the more formal plural form of you in these exercises ?

If not new speakers should know that when speaking to an older person or in formal situations they should use the more formal plural form of you.

thanks

[Theo_Matrakas]

You're right! I added it :)