complete the sentence with must-mustn't
1.you....... cheat at exam
2.you...... knock the door when you want to enter
3.in viet nam, you........ drive on the left
4.you........ slow down at the traffic lights
5.you.......behave well with the old people.
6.you.....break things on the first day at tet
7.you...... fight friends at school.
8.you........ wear a helmet when you sit on the motorbike
complete the sentence with must-mustn't
1.you...mustn't.... cheat at exam
2.you...must... knock the door when you want to enter
3.in viet nam, you...must..... drive on the left
4.you...must..... slow down at the traffic lights
5.you...must....behave well with the old people.
6.you..mustn't...break things on the first day at tet
7.you...mustn't... fight friends at school.
8.you...must..... wear a helmet when you sit on the motorbike