This book will show you can be used in other contexts..
This book will show you can be used in other contexts.. A.how you have observed B.what you have observed C.that you have observed D.how that you have observed 为什麽选B不选C啊?
This book will show you ___ can be used in other contexts. 连个下划线都没有……这句成分应该是 This book will show you what [you have observed] can be used in other contents. 看出you have observed的修饰作用了吗,去掉you have observed后,剩下的必须独立成句。