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)You____________ 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.