Expressing necessity

Tourists must have a passport to enter.

• This is an obligation

• This is necessary

• This isn't necessary

Tourists can ask for information to the police if they prefer.

• This is an obligation

• This is necessary

• This is not necessary

Tourists need to book their rooms previously.

• This is an obligation

• This is necessary

• This is not necessary

Passengers ___ fasten their seat belts.

• must to

• must

Passengers ___ show boarding passes and passports at airport security.

• have to

• don't have to

You ___ travel by bus if you prefer the train in Cusco.

• don't have to

• have to

Reservations ___ be paid in advance.

• must

• have

Emily ___ renew her passport.

• has to

• must to

Visitors to the museum ___ follow the orders of the curator.

• must

• don't have to

During the visit to the gallery, you ___ make silence.

• have to

• don't have to