he is the most boring spesker ( ) i have ever met.that,whose,which,as.为什么选a?

问题描述:

he is the most boring spesker ( ) i have ever met.that,whose,which,as.为什么选a?

这是定语从句.当先行词有形容词*修饰时只能用that来引导.并且先行词在这里是做的宾语.
the most boring~