Circle the correct words.
1. We must / have all do something to protect
the environment.
2. You don't have to / mustn't cycle in the park. Look
at the sign!
3. We've got nothing in the fridge. I have / must to go
to the supermarket.
4. You don't have to / mustn't take out the rubbish. I
can do it.
5. You have to / had to brush your teeth after every
meal. Don't you remember what the dentist said?
6. Jason has to / had to stay in bed last weekend. He
was ill.
7. We can't / don't have to wash the car. It looks clean.​