Dave's ESL Cafe's Student Discussion Forums

[jasonlulu_2000]

I　had　never　seen　her　before. The　music　was　so　attractive　that　I　listened　quietly. Lost　in　the　music, I　didn't　realize　that　I　had　been　standing　there　for　so　long　but　my　existence　did　not　seem　to　disturb　her.

Leaves　were　still　falling. Every day　she　played　the　violin　in　the　corner　of　the　building　_____　I　went　downstairs　to　watch　her　performance, I　was　the　only　audience.
A. so B. when


Which of is better? Can you explain WHY?

Thanks

[pugachevV]

Every day she played the violin at the corner of the building. When I went down to watch her performance, I was the only audience.
Is the correct answer.
So doesn't work here.