This sentence is from "Understanding and Using English Grammar" by Betty Schrampfer Azar.
"Right now I am looking at Janet. She (look) looks angry. I wonder what's the matter. She (have) has a frown on her face. She certainly isn't having any fun right now."
The correct answer is "looks angry" because I am not talking about her appearance. But if I was, can't I say "She is looking angry" if I am describing her appearance?