Fill in the sentences with have to, don't have to

1. You
   [ ] work hard if you want to become a doctor. It is not easy.
2. You
   [ ] come with me. I'm the only one who knows how to get there.
3. We
   [ ] do something to protect the environment.
4. You
   [ ] give me a lift. I will walk.
5. You
   [ ] do the washing up. Patty has done it already.
6. You
   [ ] go to the desert to see camels. You can see them at the zoo.