Ngữ pháp: Động từ have to/ must

You ______ pay for the snack. It’s free.

Do we _____ our shoes off when entering the church?

She ______ up her son at school at five o’clock.

You _____ pick up flowers in the school garden.

Travelling on mountains is really dangerous, so you _____ go alone.

We _______ eat sweets in the classrooms.

I ______ watch TV late at night. My parents say I must go to bed early.

You____ put the rubbish into the bin.

You ______ take photos in this museum. It's against the rule.

You ________ speak on the mobile phone on an aeroplane.

I _______ do my homework. My teacher said so.

This is the smoking room at this airport . You ______ smoke in this room.

You _______ across the road without looking around.