Complete the sentences with a suitable modal verb. Use must, should, must have, mustn't and shouldn't.
1)You _______ drive on the pavement.It's illagel. 2)You _______ say that. It's not nice. 3)He's not here. He _______ gone out. 4)You _______ eat more vegetables.They're good for you. 5)You________ be 18 before you can buy alcohol. 6)Boys and girls, you ... hand in your essays by Thursday.