Choose the correct forms, don't have to, mustn't, to comlete the sentences below/ 1)you apologise; it isn't necessary. 2) you tell the boss what happened, or he'll fire you. 3) i wear a tie; i do it because i like wearing ties. 4) smoke in here; smoking is not allowed. 5) i be late. it's the most important meeting of the year. 6)you go now; you can stay a bit longer. 7) visitors to the zoo feed the animals. 8) you drive so fast; we have a lot of time. 9) we cook more; there's enough food. 10) you put salt in her food; the doctor said she can't eat salt.

1)you don't have to apologise; it isn't necessary.
2) You mustn't tell the boss what happened, or he'll fire you.
3) I don't have to wear a tie; I do it because i like wearing ties.
4)You mustn't smoke in here; smoking is not allowed.
5) I mustn't be late. It's the most important meeting of the year.
6)You don't have to go now; you can stay a bit longer.
7) Visitors to the zoo mustn't feed the animals.
8) You don't have to drive so fast; we have a lot of time.
9) We don't have to cook more; there's enough food.
10) You mustn't put salt in her food; the doctor said she can't eat salt.