I’m afraid he’s more of a talker than a doer which is he never finishes anything. (·山

问题补充：

I’m afraid he’s more of a talker than a doer，which is he never finishes anything. (·山东，26)

A. that

B. when

C. where

D. why

答案：

A. that

B. when

C. where

D. why

解析：D

解析句意为：我觉得与其说他是个实干家不如说他是个空谈家，这就是为什么他从来不会完成任何事情的原因。分析句子结构可知，which引导非限制性定语从句，which指代前面的整个句子he’s more of a talker than a doer；在定语从句中，is后面为表语从句，由句意可知which指代的内容是表语从句内容的原因，故用why引导表语从句。