fill in must/ mustn' t, have ( has) to / don' t( doesn' t ) have to. 1) you....... do your homework. 2) i..... take my umbrella. it' s raining.3) you......walk on thin ice. 4) she....... go to school today. it' s sunday. 5) mary ....... go to the dentist. 6) you....... feed animals the zoo.