Fill in the blank with a suitable preposition.
Rita reminded me that the music show starts _______ 6:00 pm.
The given sentence indicates a specific time at which the music show starts. Therefore ‘at’ is the suitable answer, since ‘at’ is generally used while speaking about a specific time. Thus option B is correct. On the other hand, ‘on’ is used to indicate a day or date. Hence option C is incorrect. The prepositions ‘for’ is used to indicate a time period or duration, while ‘to’ is used to signify the end of a duration. Since the sentence speaks about a specific time 'for' and 'to' are unsuitable in the given context. Thus options A and D are incorrect.