- You __________ wear a seat belt when travelling by car. It's the law. -   must
-   should
 
- You __________ learn to drive even if you don't have a car. It's really useful to be able to drive. -   should
-   don't have to
 
- Dad __________ get up early tomorrow because he isn't going to work. -   doesn't have to
-   mustn't
 
- You __________ smoke anywhere in this building. -   mustn't
-   don't have to
 
- In the UK you __________ buy suntan lotion because the sun never shines! -   don't have to
-   mustn't
 
- All the buses were full; I __________ get a taxi. -   had to
-   should
 
- Yes, I think all Europeans __________ have a passport to visit the USA. -   have to
-   must
 
- You __________ clean the kitchen - it isn't dirty. -   don't have to
-   mustn't
 
- You __________ eat too many sweets. They're bad for your teeth. -   shouldn't
-   don't have to
 
- We really __________ arrive late or they'll be angry. -   mustn't
-   don't have to