We .................. be hardworking and listen to the teachers.
must
We ................ be quiet in the library.
must
We ........................... listen to music in the classroom.
mustn't
We ...................... eat and drink in the classroom.
mustn't
We ................................ be naughty or laugh at people.
mustn't
We ............................ put litter in the bins.
must
We ....................... wash our hands before lunch.
must
We ....................... do our homework.
must
We ............................... use mobile phones at school.
mustn't
We ......................... shout in class.
mustn't
We .......................... drop the litter on the ground.
mustn't
We .............. be polite and help people.
must