People who find a book can also leave a journal entry describing what they thought of it. E-mails are then sent to the BookCrossers to keep them updated about where their books have been found. Bruce Pederson says the idea is for people not to be selfish by keeping a book to gather dust on a shelf at home.

　　BookCrossing is part of a trend among people who want to get back to the "real" and not the virtual(虚拟). The site now has more than one million members in more than one hundred thirty-five countries.

1.Why does the author mention book groups in the first paragraph?

　A.To explain what they are.

　B.To introduce BookCrossing.

　C.To stress the importance of reading.

　D.To encourage readers to share their ideas.

2.What does the underlined word"it"in Paragraph 2 refer to?

　A.The book. B.An adventure.

　C.A public place. D.The identification number.

3.What will a BookCrosser do with a book after reading it?

　A.Meet other readers to discuss it.

　B.Keep it safe in his bookcase.

　C.Pass it on to another reader.

　D.Mail it back to its owner.

4.What is the best title for the text?

　A.Online Reading:A Virtual Tour

　B.Electronic Books:A New Trend

　C.A Book Group Brings Tradition Back

　D.A Website Links People through Books

答案

1.B　2.A　3.C　4.D　

The meaning of silence varies among cultural groups. Silences may be thoughtful, or they may be empty when a person has nothing to say. A silence in a