3 Do you must do your homework after school? Yes, I do.
4 What should you do when there is a thunderstorm? You should turn off all the electronic things at home.
5 Should we wear sunglasses in winter? No, we shouldn't.
What time must you be back home from a party? I must be at 10 o'clock in the evening.
Where you sholdn't shout? You shouldn't shout at the museum.
What you mustn't do at home? I mustn't clean the windows.