2. complete the sentences with the correct modal verb. use must, mustn't, or don't have to. i (1) go to school from monday to friday. we (2) wear a uniform, so i normally wear sports clothes. we (3) arrive late, and we (4) go to every class. in class, we (5) shout, play or sing. we (6) have lunch at school, so i sometimes go home. when school finishes, i (7) look after my little sister. when my parents come home i (8) stay in, so i usually go out with my friends. when i get home, i (9) do my homework. i (10) go to bed late, except on fridays, when i (11) go to bed before midnight.