Modals of Obligation

We have a lot of work tomorrow. You _______________ be late.

• mustn't

• don't have to

• doesn't have to

You _______________ tell anyone what I just told you. It's a secret.

• mustn't

• don't have to

• doesn't have to

The museum is free. You _______________ pay to get in.

• mustn't

• don't have to

• doesn't have to

Children _______________ tell lies. It's very naughty.

• mustn't

• don't have to

• doesn't have to

John's a millionaire. He _______________ go to work.

• mustn't

• don't have to

• doesn't have to

I _______________ do my washing, because my mother does it for me.

• mustn't

• don't have to

• doesn't have to

We _______________ rush. We've got plenty of time.

• mustn't

• don't have to

• doesn't have to

You _______________ smoke inside the school.

• mustn't

• don't have to

• doesn't have to

You can borrow my new dress but you _______________ get it dirty.

• mustn't

• don't have to

• doesn't have to

We _______________ miss the train, it's the last one tonight.

• mustn't

• don't have to

• doesn't have to