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?

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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?

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.

C

A
heard sb do sth

是c呀!!

A

A