Insert mustn’t, can’t or needn’t.

1. We go to school during holidays. 2. You speak along with your teacher. 3. You run across the road. 4. 4-year-old children go to school because they are too young. 5. You go outside without a hat in winter. 6. We help you, sorry. We have no time now. 7. You give me your phone number. I already know it. 8. You do this task without a dictionary. 9. We hurry. We have a lot of time. 10. You write the test now. You can do it tomorrow. 11. You stay at the party for too long. Your parents will worry. 12. We meet them at the station. They want to surprise us by their arrival.

Insert mustn’t, can’t or needn’t, shouldn't

1. We needn’t go to school during holidays. 2. You  mustn’t speak along with your teacher.  

3. You mustn’t run across the road.  

4. Four-year-old children needn't go to school because they are too young.  

5. You mustn’t go outside without a hat in winter.  

6. We can’t help you, sorry. We have no time now.  

7. You needn’t give me your phone number. I already know it.  

8. You can’t do this task without a dictionary.  

9. We needn’t hurry. We have a lot of time. 10. You needn’t write the test now. You can do it tomorrow.  

11. You mustn't / can't stay at the party for too long. Your parents will worry.  

12. We needn’t meet them at the station. They want to surprise us by their arrival.