Complète à l'aide de must, need, have to ou should.
a. You ... fasten your seatbelt when you drive a car.
b. You ... think about it! It's important!
c. He will... take a taxi when he arrives at the airport, it's too far to walk.
d. You ... take a jacket. It's cool outside.
e. My son's hair ... cutting, it's really too long now.
