a) Fill in at, in or on. b) In pairs ask questions and write the answers.

Fill in at, in or on.

a) The preposition 'at' is used for specific times of the day (at night, at noon), for holidays without 'day' (at Christmas), and for specific locations or events (at the bus stop, at a party).

b) The preposition 'in' is used for longer periods like months, years, seasons, and parts of the day (in January, in 2023, in summer, in the morning).

c) The preposition 'on' is used for specific days of the week and dates (on Monday, on the 15th of May).

Answer: Fill in at, in or on.