1. Nowadays Vietnamese pupils ______ learn English at school.

2. You ________ smoke in public areas.

3. Today my father ______ go to work. It’s a holiday.

4. You ______ scream. I can hear you clearly.

5. You ___________ quiet in the library.

6. You _______ use a smartphone on the plane.

7. He ________ come to the dentist with me.

8. At the restaurant, you _______ pay the bill but you don’t have to eat everything.

9. She is sure she heard something, but it _______ have been the wind.

10. You _______ obey the rules or you will be expelled.

11. I ________ go to school right now. My class starts at 8:00 am and it’s already 7:30 am.

12. We can solve this problem by ourselves, so you _______ help us.