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