It came to a well.In the well,it hear a frog.这里为什么可以省去frog's vioce
问题描述：
It came to a well.In the well,it hear a frog.这里为什么可以省去frog's vioce
如果加上frog's vioce,需不需要去掉"a"?
答
可以,就像：
Can you hear me?