Here are the answers to your question, plus the ones that were not mentioned. (All are correct, I had this in an assignment and got them all right).
1. (spokesmen) - one who speaks for, or on behalf of, others
2. (subjection) - being brought under the control or authority of another
3. (Jewish religious rulers) - falsely accused Jesus
4. (five hundred) - Jesus appeared to them together following His resurrection
5. (Paul) - states that Jesus appeared to James after His resurrection
6. (Jerusalem) - a place where Holy Spirit descended
7. (Christ) - same as Anointed One or Messiah
8. (willing slave) - the meaning of servant in Greek