I was listening to the music____there was a knock at the door.A.though B.when C.because D.until为什么选B不选D,怎么可能一边敲门还比一边听歌啊.选D不是很符合情理麽?尽量详细噢.

I was listening to the music____there was a knock at the door.A.though B.when C.because D.until为什么选B不选D,怎么可能一边敲门还比一边听歌啊.选D不是很符合情理麽?尽量详细噢.
I was listening to the music____there was a knock at the door.
A.though B.when C.because D.until
为什么选B不选D,怎么可能一边敲门还比一边听歌啊.选D不是很符合情理麽?
尽量详细噢.

I was listening to the music____there was a knock at the door.A.though B.when C.because D.until为什么选B不选D,怎么可能一边敲门还比一边听歌啊.选D不是很符合情理麽?尽量详细噢.
选B when可以指“当”“这时”
我正在听音乐,这是有人在敲门
这是在考察过去进行时

B 当听到有敲门声的时候我正在听歌
不是我在敲门，而是某人在敲，我听见了，从句意上就应当选B

B when 这里是从属连词表示at that time D until用于肯定句中表示一直到，与整个句意不相配

B 句子意思。我正在听歌时，传来了敲门声
D的意思是直到