精选优质文档-倾情为你奉上第五部分 完形填空The book is the best research machine invented. Since mass printing began a few hundred years ago, it has given hundreds of millions of people _1_ they could not have found anywhere else.But many readers dont know _2_ a book is organized to help them. They see the different parts of a book. However, the reason for such an organization _3_ them.The first thing to look at is the title and the author. Every _4_ a title doesnt tell you very much about wha
