He asked me if I often heard Jenny ___________ pop spngs in the n_英语解答

He asked me if I often heard Jenny ___________ pop spngs in the next room.
A) sing B) to sing C) singing D) was singing
选什么?为什么?

人气：346 ℃　时间：2019-11-21 14:48:58

解答

选A
hear有如下两种用法：
hear sb do 听到某人做某事的全过程.
hear sb doing 听到某人做某事的动作.