1) winter a) in b) at c) on 2) 1995 a) on b) in c) at 3) Tuesday a) on b) in c) at 4) March a) on b) in c) at 5) Christmas a) in b) at c) on 6) 23rd of September a) on b) in c) at 7) night a) in b) on c) at 8) the morning a) on b) in c) at 9) the weekend a) at b) in c) on 10) 7.30pm a) in b) at c) on 11) Halloween a) on b) at c) in 12) half-past nine a) on b) at c) in 13) Monday morning a) on b) at c) in 14) July 4th a) at b) in c) on 15) Spring a) on b) at c) in

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