"We like her appearance."
Translation:Podoba nam się jej wygląd.
Hm... It looks like 'lubimy' was marked as a second main translation by mistake. The excercise teaches 'podobać się' and frankly it even fits this sentence better.
Podobać się expresses a positive reaction to visual or emotional stimuli, and mostly when it's a first/early impression. It's also used with more abstract concepts. I don't recommend using 'lubić' here.