We .................. all wear seat belts in the car.
must
have
2. You ............... ride your bike in the park. Look at the sign!
don’t have to
mustn’t
3. Your room is very messy. You ............ to tidy it.
must
have
4. We ............ take the bus. My dad can drive us to the shopping center.
mustn’t
don’t have to
5. You ..................... buy a ticket for the ride. You ................ get on without one.
have to / can't
had to / don't have to
6. Ali .......... to study yesterday, so he didn’t come to the park.
had
has to
