it is required that..和it is requested .that...有什么区别如:有人要求名人应

it is required that..和it is requested .that...有什么区别如:有人要求名人应 it is to say that 和it is said that 有什么区别? It is requested that immediate action _____when an accident It is politely requested by the hotel management that radios it is requested that rent for the house___ in advance. it is possible和it is probable that 区别 It is required that no smoking ______ in the school. It is required that the plan__out firmlyAbe carried out Bmus It is required that every student___work___hard.为什么不用works,不 it is required that the subject （ ）immediately. that is all,that is it ,that is right 区别? It says that ,It is said that和It is reported的意思和区别?