:?: Hello, please I need your help. I have some doubts about the use of the prepositions ON/IN/AT and I want to know the accurate choice for these sentences:
We want to start the meeting on time/in time, so please don t be late.
Where is the car waiting? At/on the traffic lights.
The leaves on/at that tree are a beautiful color.
He spends most of the day sitting at/on the window and looking outside.
I like that picture hanging on the wall in/at the kitchen.
Thanks a lot.