Choose the correct options

1. You [shouldn't to walk|shouldn't walk] alone in dark areas.
2. Tom has a terrible toothache, so he [shoulds visit|should visit] a dentist.
3. I'm going to a birthday party. What should I [to wear|wear]?
4. Look, it's raining! We [should bring|should bringing] an umbrella.
5. Oh, I have nothing to eat. What [should I to cook|should I cook]?
6. Stella [shouldn't be|shoulds not be] so rude to people.