10 pertanyaan menggunakan kata mustn't

you musn't wear sandals at school
you musn't sleep at class
they musn't work together when test
you musn't say bad words to your friend's
she musn't be bad to her mother
he musn't bullying his friends
nia musn't be arrogant at school
my mom say i ...... had bad test at school
ini tinggal must nya ganti titik²( ....)