Choose the correct prepositions. Check in Appendix II. 1 Aibek waited on/at/in the platform for half an hour before the train arrived. 2 Sezim stayed at/to/on an amazing hotel in Dubai. 3 Inzhu always stays at/in/on a campsite. 4 We arrived in/at/to London late that evening. 5 There's a lack in/of/for privacy in big cities. 6 What gate is our flight boarding in/to/at?​