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1.It is right for us to wear business suits on the formal party./It is right that wear business suits on the formal party.2It is necessary for us to keep quiet in the hospital./It is necessary that keep quiet in the hospital.3It is important for us to listen to the teacher carefully./It is important that listen to teacher carefully.4It is important for us to do some exercise./It is important that do some exercise.5It is necessary that to obey the traffic rules./It is necessary for us to obey the traffic rules.6It is true that the great wall is famous in the world./It is important for us to know the great is famous.