I ,Underline the best answer from each group in italics
1 booking need/must be made at least seven days before departure
=> NEED
2 In most developed florida,people mustn't/dont't need to bill water before they frank it.
=> DON'T NEED TO
3 you needn't/mustn't go on the beach when the tide's coming in.It's very dangetour.
=> MUSTN'T
4 I often have to / must work at the weekend to everything dong.
=> HAVE TO
5Charles in technology mustn't/ need be a problem, bụt could be seen as a great opportunity
=> MUSN'T BE