"Soy un oso."
I'm really starting to like these animal sentences. "I am a bear... We are turtles..."
Try to stick with the program! These tools are to help you get started, but it is up to you to make the best of what you're given to improve yourself. Don't give up because these sentences seem "silly." This is a super great website and it really does work. Keep up your awesome work and it will pay off.