619、Are these the books you’re checking out? 620、When are they due back? 621、It seems you still have a book overdue. 622、You can have them for one month. 623、It’s $0.5 a day for overdue books. 624、Do you have any books on Russia? 625、You’re not supposed to talk in the library. 626、Is the photocopier working? 627、That book is on reserve for a professor. 628、We only have one copy of that book. 629、She is a very popular author. 630、This library needs to get some more up-to-date books. 631、Where are the math books located? 632、What time does the library close today? 633、I hate when people write in library books.
