Some of the verbs in these sentences are incorrect

Some of the verbs in these sentences are incorrect.Correct them if necessary1. "What are you doing? "I'm a teacher."What Do you do? "I'm a teacher."2. Look.That Girl is smiling at you.3. He's going to the gym every day.4. I wear jeans today.5. I'm not understanding you.6. I don't like classical music.7. What does she do tomorrow evening? 8. Which do yo prefer, pizza or pasta?