I think "Ou garde-t-elle le sel?" (Where does she keep the salt?) should also be marked correct. Both the singular and the plural sound alike on this quiz question.
Keep in mind that it is free. It is a huge system and glitches are inevitable.
This was presented to me in spoken form. Can a francophone actually tell the difference between
"Où garde-t-elle le sel" and "Où gardent-elles le sel "
What should be be listening for?
I am a francophone and I confirm. Without any context it is not possible to tell the difference because both phrases should be pronounced the same.
I heard the same, I think it's correct, it's the singular form of the verb, that's all.