You couldn't understand people w___ speak quickly明天老师讲后我来选满意答案吧

You couldn't understand people w___ speak quickly明天老师讲后我来选满意答案吧
You couldn't understand people w___ speak quickly
明天老师讲后我来选满意答案吧

You couldn't understand people w___ speak quickly明天老师讲后我来选满意答案吧
who

我觉得应该是 why who 的话 speak 应该加s

我觉得就是who，和一楼一样