thank you> Could you explain to me why in is the correct choice? When an activity is referred to, which preposition is to be used? in or at? at/in the meeting, at the party Are these phrases correct?
in is correct. It emphasizes the time during which the match took place. at is correct. It emphasizes the place where the match was held -- or the mere occasion of the match.
I believe that in most cases I would instinctively use:
at the [match / game / meeting / (family) reunion / party / concert / performance / play / recital / lecture / (poetry)