Modals of Obligation and Prohibition

I ____________do my homework every day.

• must

• mustn't

You ______________eat too much fast food.

• must

• mustn't

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

• can

• can't

You __________ put the rubbish into the bin.

• must

• mustn't

• has to

• don't have to

You ___________drink and drive.

• must

• can't

• mustn't

• need

We __________ take the dog for a walk.

• has to

• have to

My brother ______________ wear a tie at his work. He is a lawyer.

• have to

• has to

• doesn't have to

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

• mustn't

• don't

• doesn't have to

You ______________ smoke in this office. It's the rule.

• must

• mustn't

I _______________ clean the floor today because I cleaned it yesterday.

• have to

• must

• don't have to