高人请帮忙解析一下这道英语题

来源：百度知道 编辑：UC知道 时间：2024/05/09 14:14:29
This book will show you ___ can be used in other contexts. A.how you have observed B.how that you have observed
C.that you have observed D.how what you have observed
答案是D
我不明白为什么要加how

这本书可以告诉你,你所观察的怎样运用在别的背景下..
how这里表示怎么运用的意思. what you have observed 整个看作一个整体sth
就可以看成 how sth can be used in other contexts ?

show的宾语是how...can be used这句话，what you have observed是这句话的主语。

这是句how引导的宾语从句，what you have observed 是从句的主语

简单一点说,"what you have observed"可以被看作一个整体,意思是"你观察到了的"
整句的意思就是:这本书会告诉你你所观察到了的是怎样在其它文章中应用的.