Prepositions of Time 1) The boys start eating their lunch in/at/on 12:00.
2) It snows all the time in/at/on December.
3) They practice soccer in/at/on Saturday.
4) Sir Isaac Newton was born in/at/on the 17th century.
5) In/At/On breakfast, she drinks coffee with only sugar.
1) at
2) in
3) on
4) in
5) at