Подставьте have to, must or can 1) quite during the lesson. 2) shoes when you play beach volleyball. 3) crash helmet if you drive a motorbike. 4) the road when the traffic light is red.

1) Yo must be quite during the lesson.
2) You can wear shoes when you play beach volleyball.
3)You have to wear crash helmet if you drive a motorbike.
4) You  must  cross the road when the traffic light is red

1-have 
2-have not to wear 
3-must
4 must not cross