The old man found his son's home ____ ____ ____ ____(在……的帮助下) the policeman

问题描述:

The old man found his son's home ____ ____ ____ ____(在……的帮助下) the policeman
怎么填 为什么?

是with the help of 不是under the help of ,另外若是有三个空格,可以填with one's help (当然此题不能填这个)