Have to, must

Sally _______ brush her teeth. She is going to the dentist.

I ___ leave early today because of the doctor's appoinment.

You ___ bring the towel . There are some towels at swimming pool

We go to school by bus. We _______ pay the ticket or pay for a pass.

Before crossing the street we __________ look left and right. We _______ cross without looking.

You ____ step on the grass in the park.

When we use our bike, we _____ wear a helmet.

At school we wear uniforms: we ___ wear a white shirt and blue trousers.

You _______ take photos at school! It's prohibited!

She is eating in a restaurant, she ________ to bring her fork.

In Britain, we ___ drive on the left.

Students ___ turn off their mobiles during the lesson or the teacher will take them away.