peter,an,lady,heiped,old,way,his,school,to,(.)连词成句

问题描述:

peter,an,lady,heiped,old,way,his,school,to,(.)连词成句
括号里的是句号

Peter helped an old lady on his way to school.
应该少了个ON,介词.on his way to school表示在往学校路上