Susan was listening to music at this time yesterday.(对划线部分提问）was listening to music(是划线部分）___ ___ Susan ___ at this time yesterday?

Susan was listening to music at this time yesterday.(对划线部分提问）was listening to music(是划线部分）___ ___ Susan ___ at this time yesterday?
Susan was listening to music at this time yesterday.(对划线部分提问）
was listening to music(是划线部分）___ ___ Susan ___ at this time yesterday?

Susan was listening to music at this time yesterday.(对划线部分提问）was listening to music(是划线部分）___ ___ Susan ___ at this time yesterday?
What was, doing

What was doing

What was Susan doing at this time yesterday?