Modal Verbs (mustn't,have to,don't have to)

1.You .....touch that. It's hot!

2.It's OK,you can go. You...... wait for me-I will come later.

3.We ...... bring dictionaries to school.There are lots in the classroom.

4.You ...... buy the tickets online. There isn't a phone number.

5.You ....... put the knife in your mouth when you eat.It's dangerous.

6.We ..... get the early train. The lessons start later today.

7.In the race,first they...... swim a long way,then run,then cycle!

8.Be quiet! You ..... talk during the exam.

9.In Singapore you....... chew gum in public.

10.You ..... be noisy.

11.You ..... be quiet.

12.You .....sleep in the afternoon.