Try deleting the tracks that are still waiting. Do not move to trash. Sign out if iTunes Store/ match, restart iTunes, sign back in and run match. Select add this computer if prompted. Let process complete.
Next gradually add back the deleted tracks. If you still have the CD's you could re-rip them at a good quality - at least 256 Kbps AAC.
Quite often the problem is with at least one track that match does not like - corrupted file?