D.listening to
listen to
是个词组,不能分,to也不能去掉
listen to
1.听：
We are listening to him playing the piano.
我们在听他们弹钢琴.
2.仔细听；听取(意见等)；认真思考：
We should listen closely to the outspoken criticisms.
我们应该仔细倾听直言不讳的批评.