单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．1016.
B．508.
C．1060.
D．580.
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单项选择题
A．The early history of bookbinding.B．Economical ways to protect old books.C．How old books become valuable.D．Why some books decay.
A．The early history of bookbinding.
B．Economical ways to protect old books.
C．How old books become valuable.
D．Why some books decay.
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