Modal verbs of obligation

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

• don't have to

• mustn't

• must

• have to

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

• don't have to

• must

• mustn't

• need to

I ____ work harder, or I'll fail the exam.

• must

• have to

I _____ forget my key or I won't get back in.

• needn't

• mustn't

Anne (a)   (wear) a uniform in school. She hates it.

We (a)   (leave) so early -we arrived two hours before my parents' arrival, and now we'll have to wait.

I (a)   go to the shops. There's enough food in the fridge.

You (a)   tell your mother, it's a surprise.

You (a)   tell Jim, I've already phone him.

You (a)   smoke in here, it's forbidden.