must / have to / can

All visitors ___ wash their hands before entering this room.

• can

• must

• mustn't

• can't

Passengers ___ stand up until the plane has completely stopped.

• must

• mustn't

• have to

• don't have to

Visitors ___ take photos using flash photography.

• can't

• must

• don't have to

• have to

Passengers ___ wear their seat belts at all times.

• don't have to

• can't

• have to

• mustn't

You ___ wear a hard hat at all times on this construction site.

• can

• must

• can't

• mustn't

You ___ smoke in this hospital.

• don't have to

• have to

• can

• can't

I work as a receptionist in a big hotel, so I ___ be polite to guests.

• must

• mustn't

• can

During the week, I ___ go to bed late beacuuse I have to start work early.

• don't have to

• can't

• must

Fortunately, I ___ wear a uniform, but I have to dress smartly.

• don't have to

• mustn't

• can't

My sister's a student, so she ___ get up early most days.

• mustn't

• doesn't have to

• can't