问题描述：
I don't know _____ ____ this book is.【我不知道这本书多少钱】
His brother ___ school things ___ that store.【他弟弟从那个商店里买学习用品】
His brother ___ school things ___ that store.【他弟弟从那个商店里买学习用品】
问题解答：
我来补答展开全文阅读