1. You should spend more time talking with your children
2. John mustn't use that computer
3. People who work here must leave by 6p.m
4. Every staff mustn't smoke or eat in the office
5. Customers ought to check their luggage before leaving the airport
6. Students mustn't cheat in the exam
7. Ms Ly has to clean the floor every day
8. You mustn't take photographs in the museum
9. You ought to share the housework with your mother
10. Jack doesn't have to call Ben today
