Grammar test: Preposition pt. 1

Time, Occasions and Seasons __ the 21st century, technology exploded. In On At “In” talks about a period of time and is more than One day. Example: weeks, years, decades, months. We’ll have another meeting __ the 5th of October. in on at ”On” talks about a specific days and recurring dates. Example of recurring dates: My family has dinner together on Sundays. Let’s watch the new video lesson tonight __ 9pm tonight. in on at ”At” talks about a section or part of the day like dawn, night, noon, 8 o’clock, etc., and Holiday seasons like halloween, Christmas, etc.. Now is your turn to answer. Stores run out of egg __ Easter. The test will be __ four days. They usually hangout __ Mondays.