Students …………. talk in the library.
mustn't
You …………….. study hard if you want to pass your exams.
must
Look! There is an intersection ahead. You ………….. slow down.
must
You ……………. be nice to your classmates.
must
You ……………. forget to do your homework regularly.
mustn't
You ……………… fight with your classmates.
mustn't
You …………… wear warm clothes when it is cold outside.
must
You ……………… forget your best friend's birthday.
mustn't
We ……………….. hurry or we will be late.
must
The road is very wet and slippery. Drivers ………………. be careful.
must
The sign says ‘No swimming'. We ……………..swim here.
mustn't
You ……………… be rude to your grandparents.
mustn't
You ………………. listen to your teacher very carefully.
must
You ………………. play football in the classroom.
mustn't
You _____ brush your teeth three times a day.
must
You ……………. chew gum in class.
mustn't
You..........stop drinking wine.
must