Answer:
1. a
2. on
3. to
4. of
5. a
6. me
Explanation:
1. meeting's singular so its article will be "a"
2. go (on), this is a phrasal verb
3. (to) eat, the most suitable preposition in this context
4. six (of) us
5. (a) really amazing day, it's singular
6. me, because it is in first person