请问一下一道英语的单选

问题描述:

请问一下一道英语的单选
He was often listened ______ in the next room.A.sing B.sung C.to sing D.to to sing
而我选C为什么不对啊?还有,不及物动词不是没有被动语态吗listen!

He was often listened ______ in the next room.A.sing B.sung C.to sing D.to to sing答案选D 而我选C为什么不对啊?还有,不及物动词不是没有被动语态吗listen!listen是不及物动词,但是listen带上它相应的介词to就...