I was listening to music ___ my English teacher came in.横线上应填when还是while我觉得应该填while,因为含有while的句中常用进行时态.

I was listening to music ___ my English teacher came in.横线上应填when还是while我觉得应该填while,因为含有while的句中常用进行时态.
I was listening to music ___ my English teacher came in.横线上应填when还是while
我觉得应该填while,因为含有while的句中常用进行时态.

I was listening to music ___ my English teacher came in.横线上应填when还是while我觉得应该填while,因为含有while的句中常用进行时态.
咳咳when也可以……我认为是when.这是过去进行时嘛.以前上朗文老师说while是在一个时间段中的一件事.这是一个时间点的事.是吧?