Salut!
1) I peacefully showed them my passport.
2) You are not allowed to come into the discotheque if you are under 18.
3) The doctor told me I had to cut down on sweets and soft drinks.
4) You don't have to come to class tomorrow.
5) I'm going to tell you a secret but you must not tell anyone else.
6) I shouldn't have been so rude to the hotel receptionist.
Sper că te-am ajutat!