问题
选择题
No matter ______ the CRH accident in Wenzhou, it had and will have much warning significance.
A．how the investigators said caused
B．what the investigators said caused
C．why the investigators said caused
D．the investigators said how caused
答案
答案：B
题目分析:考查让步状语从句。从no matter+疑问词 引导让步状语从句可以排除D选项，疑问副词how， why 在句中不做主语，所以排除A,C选项，故正确选项是B。句意：不管调查人员说是什么造成了温州动车事故，它都已经产生了并且还要产生很大的警示意义。