2. It was impossible for us to take a trip to the mountain.
- We ____________________________________________________________________
3. It is obligatory for me to submit my homework tomorrow.
- My homework____________________________________________________________
4. It was wrong of you not to prepare homework which the teacher gave you.
- You ought_______________________________________________________________
5. Children are necessary to greet old people in the family first
- Children________________________________________________________________
6. They were obliged to live with their parents before they got married
- They ___________________________________________________________________
7. Students mustn/t use cell phone in the lesson in Viet Nam
- Students are not __________________________________________________________
8. They are not allowed to cheat in the examination
- They ____________________________________________________________________
9. It is not good idea for children to use facebook too much
- Children__________________________________________________________________
10. It is rarely necessary to book tickets for the show in advance (needn/t )
- You ______________________________________________________________________
11. We cannot make a speech at the meeting this afternoon (impossible)
- It ________________________________________________________________________
12. Maybe Peter forgot that we changed the time of the meeting (might)
- Peter _____________________________________________________________________
13. Cyclists are not allowed to ride on the station platform (mustn/t)
- Bicycles _________________________________________________________________.
14. It is not good for us to undervaluate women/s ability at work
- We ______________________________________________________________________.
