Questions 19 to 22 are based on the conversation you have just heard.

　　19. The early history of bookbinding.

　　How old books become valuable.

　　Economical ways to protect old books.

　　Why some books decay.

　　20. They are often handled improperly by readers.

　　The paper is destroyed by chemicals.

　　The ink used in printing damages the paper.

　　The glue used in the binding loses its strength.

　　21. They are difficult to read.

　　They are slowly falling apart

　　They were not made from wood pulp.

　　They should be stored in a cold place.

　　22. Get some books for the man to look at.

　　Ask the man to look over her notes.

　　Continue her research in the library.

　　Find more information on how books are preserved.

　　Questions 23 to 25 are based on the conversation you have just heard.

　　23. Which major the woman will be choosing.

　　An anthropology course the woman is taking,

　　How to find a job in publishing.

　　which anthropology professors the man recommends.

　　24. It is not as difficult as she had thought it wonld be.

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