Question

underline the correct option in each sentence.
1.We have to leave at nine o'clocks
clock so you mustn't /don't have to be late.
2.come if you want to, but you mustn't/don't have to
3.u mustn't/don't have to talk when the teacher is speaking
4.You mustn't/don't have to leave the class without your teacher's permission 5. please help yourselves to food. You mustn't/don't have to ask


7. He's very rich. So he mustn't/doesn't have to work.​

Answer 1

1. mustn't
2. don't
3. mustn't
4. mustn't, don't
5. doesn't