17 Complete the sentences with the correct prepositions at, on, or in. 1 Is your birthday ............. 22nd May? 2 Tim often plays football .............. the weekend. 3 My birthday is ............. November. 4 My English lesson is ............. half an hour. 5 We stay at my grandparents' house............... Christma I sometimes watch a DVD .............. the evening. 6 7 I often go to the beach............... a hot day. 8 I'm going on holiday..... .... a week.​