Question

I’m afraid he’s more of a talker than a doer，which is ________ he never finishes anything. 

I’m afraid he’s more of a talker than a doer，which is ________ he never finishes anything. (2011·山东，26) A．that B．when C．where D．why

Answer 1

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。