答：what surprised me was not A but B.
A和B应为名词性的.
A=what he said= the words that he said.
B=the way (that/in which) he said it.
译：让我感到惊讶的不是他说的话,而是他说话的方式.
析：the way是被定语从句所修饰的先行词,不作定语从句中的任何成分.作定语从句中的成分是的关系词that/ in which,这里省略了.关系词that应看作关系副词（关系副词中没有how),因为它相当于介词in+which,在定语从句中是作状语的.它还可以省略.这是定语从句的特例.