Вставьте mustn't, needn't, ought to, must. 1.Visitors ... feed animals at the Zoo. 2. You ... buy bread, you've got a lot. 3. You ... take care of your pet. 4. ... I go there? No, you ... .
1. Visitors mustn't feed animals at the Zoo.
2. You needn't to buy bread, you've got a lot.
3. You must take care of your pet.
4. Ought I go there? No, you oughtn't to.