Question

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.

Answer 1

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.

Answer 2

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 don't have to 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.