"Do you mix the salt and the pepper?"
Translation:Unisci il sale e il pepe?
I don't know if it's necessarily wrong to add the subject pronoun tu, but I think duolingo is trying to teach us to omit them when they're not necessary. This site shows 3 rules when the subject pronoun is actually required:
I'm guessing that if you put the word "tu" after "unisci" it could be right...
Is there any reason why "ed" should not be accepted here? I'm still not 100% clear on when to use it, but "ed il pepe" seemed as good of a place as any.
I believe the rule is that s words take lo if a consonant follows the s (lo squalo, but il serpente).