Fill in the Blanks Must and mustn'tOnline version Complete with the correct word. by Silvia Delgado 1 smoke study arrive cheat pay wear throw drink use eat You must your uniform . He mustn't late to school . She mustn't in the school . He must attention in class . You mustn't your phone during the exam . He mustn't alcohol in the school . You must for the exam . We mustn't in class . She mustn't garbage . You mustn't in your exams .