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1 You mustn't hurt children  2 You mustn't stay/be here 3 You mustn't feed animals in the zoo 4 We can't/mustn't use the phone on private business 5  One shouldn't interrupt each other during the discussion  6 You musn't show him that you feel sorry for him  7 You musn't/shouldn't contradict him, you must respect his age  8 She shouldn't have missed the seminar  9 "You mustn't argue with older people" said Mother  10 You shouldn't have interfered in their affairs. You have spoilt everything