[-B1] While listening to pop music,________.A.she felt asleepB.the light went outC.someone knocked at the doorD.and she couldn't help laughing

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[-B1] While listening to pop music,________.A.she felt asleepB.the light went outC.someone knocked at the doorD.and she couldn't help laughing

[-B1] While listening to pop music,________.A.she felt asleepB.the light went outC.someone knocked at the doorD.and she couldn't help laughing
[-B1] While listening to pop music,________.
A.she felt asleep
B.the light went out
C.someone knocked at the door
D.and she couldn't help laughing

[-B1] While listening to pop music,________.A.she felt asleepB.the light went outC.someone knocked at the doorD.and she couldn't help laughing
翻译:当(她)听流行音乐的时候,她睡着了.
1.此题考查状语从句的省略,该语法规定如下:如果状语从句的主语和主句主语一样,且从句谓语含有be动词时,可以把从句的主语和be动词一起省略.
即:while listening to pop music = while + (主句主语 + be动词) + listening to pop music.
2.很明显,这就要求主语主语必须是sb,而不能是sth,因为它有一个“listen to pop music”的动作.
由此排除用sth作主语的答案B;
3.C的主语someone虽然也是sb,但是句意不通:“当某个人听流行音乐的时候,这个人还在敲门”,排除C.
4.D更错得离谱,while引导一个时间状语从句,后面的主语居然又用连词and引导.
楼主应该知道:主从复合句的连词只能用一个,比如because/so,although/but不能连用.
所以正确答案为A.

简单地说,就是前后主语必须得保持一致。
发出listen这个动作的是she,而且中间有逗号,不用and