阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The difference between a part-time bookseller and a professional one isn't a clear line in the sand. At one time, a professional bookseller might have been defined as someone 【小题1】primary occupation was selling books. Changes in both technology and the market【小题2】（influence) that a little, with the Internet allowing anyone to list books for sale.

A professional bookseller is an individual who has thoroughly studied how to identify books and 【小题3】（accurate)describe their condition.That knowledge can be gained by years of experience working for another bookseller or as 【小题4】 buyer and collector.

A professional bookseller 【小题5】 (value) their customers even more than the 【小题6】（sale) of individual books. The professional is in the business for the long term. Individual books in their list come and go, 【小题7】 the relationship with their customers gets closer.

A professional bookseller pairs their knowledge of books with salesmanship, 【小题8】(help) communicate the value of a book to potential customers. The ideal description of a book combines an accurate list of important features along with a 【小题9】 (detail) description of the condition of the individual copy. There's plenty of room in an online book description for a professional bookseller to stress on the 【小题10】 (important) of a particular work.