题目内容：

No one is sure how many Americans belong to reading groups called book clubs. Yet1. (publisher) and bookstores report that more and more people throughout the United States are joining2. (they).\

Most of the clubs work the same way. Members read the same book at the same time. Then they meet to talk about the book. Members may be friends or people3. live near each other. Some Americans belong to reading groups on4.Internet. These groups include people around the world who communicate about books they read. They send electronic mails instead of gathering5. (discuss) books.

Most reading groups study books by6. (variety) writers. However, some groups read the work of a single writer, 7. (usual) one that has been famous for a while. Other groups may8. (name) for an important person in the work of the writer, 9. a Sherlock Holmes Club. Members of these book clubs often are experts about their10. (choose) reading materials. One member of a Holmes reading group, for example, can identify almost every person in every Sherlock Holmes story.