We ___ do our homework.
mustn't
must
They ___ talk in class.
must
mustn't
You ___ turn off your mobile phone.
must
mustn't
You ___ walk on the grass.
must
mustn't
You ___ put litter in the bin.
mustn't
must
You ___ take photos here.
mustn't
must
You ___ wash your hands.
must
mustn't
You ___ pick the flowers.
mustn't
must
You ___ shout at your parents.
must
mustn't
You ___ cross the street on the red light.
mustn't
must
There ___ a park in our town fifty years ago.
was
were
There ___ a shopping mall in our town fifty years ago.
wasn't
weren't
There ___ some funny trains one hundred years ago.
was
were
There ___ any planes two hundred years ago.
weren't
wasn't
There ___ motorbikes ninety years ago.
was
were
There ___ a hotel in the town ten years ago.
were
was
