(2018·浙*高考)Thisis

问题详情：

(2018·浙*高考)This is ________ there is a saying that if you want something done, ask a busy person to do it.

【回答】

why　句意：这就是为什么有这样的一种说法，求忙人才能做成事。此处why引导表语从句。

知识点：表语从句

题型：阅读填空