Complete the sentences with at, in or on. 1) The teacher comes to school at 8 o'clock. 2) I don't usually work________summer. 3) Some shops aren't open_______the 1st of May. 4) Do you work________weekends?.5) There's a football match________May. 6)The boys have lunch________1 o'clock. 7) They never eat_________the evening. 8) The park isn't busy_________Friday.