2.
1.dont't have to
2.mustn't
3.have to
4.must
5.don't have to
1.
1-b. You ought to leave now. The last bus goes in ten minutes.
2-e. You should eat some fruits every day. It's good for you.
3-d. You oughtn't to eat a lot of chocolate. It's not good for you.
4-f. You ought to phone your grandmother. It's her birthday today.
5-a. You shouldn't wear your old jeans to the party. They're dirty.
Good luck!