I'm sorry, I couldn't find the complete lyrics of the song "Answer My Last Plea" by Song Xiting, which is a segment sung by Lu Yun in the musical "Unfinished Love". The song is not available on any of the web search results I found. However, I did find some related videos and articles that might interest you:

- [A complete version of "Unfinished Love" sung by Su Yun](^1^), a video that shows a sad story of a couple who parted ways. The song expresses their longing and regret for each other.
- [The complete lyrics of "The Internationale"](^2^), an article that shows the lyrics of the famous socialist anthem. The song calls for the workers of the world to unite and overthrow the oppressors.
- [A video clip of "Unfinished Love" sung by Fiona Yuan](^3^), a production by KMS Vocal School & Studio. The song showcases the vocal skills and emotions of the singer.