Modals of obligation

You ------ call an Uber. I’ve already done it.

• mustn't

• don't have to

You ----- tell anyone. It’s between you and me.

• mustn't

• don't have to

Our teacher says we ----- work hard on our mistakes.

• must

• have to

I really want to improve my English. I ---- practice more.

• have to

• must

I ----- look after my grandmother. I’m all she’s got.

• must

• have to

Young people --- give up their seats for the elderly on the bus.

• have to

• are supposed to

Everyone ---- wash their hands before they eat.

• is supposed to

• has to

When a woman asks you if she’s fat, you ----- tell the truth.

• are not supposed to

• mustn't

After having a picnic in a park, people ---- clean up after themselves.

• don't have to

• are supposed to

When you’re at a party, you ----- drink.

• mustn't

• don't have to