С! fill in with have to\don’t have to you go to the desert to see camels. you can see them at the zoo. you hard if you want to become a doctor. it is not easy. you come with me . i'm the only one who knows how to get there. we something to protect the environment. you me a lift. i will walk. you do the washing up. patty has done it already.
2- have to
3- have to
4- have to
5- don't have to
6- don't have to