Lately I've been having some troubles when they ask the whole "Translate 'the girl'" type questions but when you do the pictures you're taught "Het meisje" for the selection of "Find this." Because when I first learned that, they had "het" on the picture. Yet they'll want the to be "de."
How do you know when to use de and het? Are the pictures just to introduce you to the differences in de and het?