You ....... return your library books on time.
must
At school, you .............. use your mobile in class.
mustn't
You .............. listen to your teacher.
must
At school, you .......... run.
mustn't
At home, you .......... clean your room.
must
You .......... eat in class.
mustn't
You ........... do your homework.
must
At school, you .......... study.
must
At home, you ......... help your parents.
must
At school you ........... cheat in tests.
mustn't
At home, you .......... make a mess.
mustn't
You ........... help others.
must
You ......... drop litter.
mustn't
You ........ change your shoes.
must