He smiled at me ___ my help,saying nothing at that moment A in respond to B in response to C responded to D responding
问题描述：
He smiled at me ___ my help,saying nothing at that moment A in respond to B in response to C responded to D responding
为啥不选A in respond to in response to区别是啥啊
答
B
固定搭配
如果D有后面有介词to也是可以的为啥不选A