no one really knows exactly when the first people arrived in _____ we now know as california

题目

no one really knows exactly when the first people arrived in _____ we now know as california
where 还是 what?

答案

填what
when 后是条件状语从句,we now know （）as california
当人们第一次来到我们现在称为的加利福尼亚时,没人真正了解他.