单项选择题

Questions 11-13 are based on the following monologue introducing the library. You now have 15 seconds to read Questions 11-13. What is the topic of this passage

A．The largest library in the United States.
B．A special system for numbering books.
C．Finding books in a library.
D．Finding a needle in a haystack.

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单项选择题

Questions 11-13 are based on the following monologue introducing the library. You now have 15 seconds to read Questions 11-13. What is the topic of this passage 您的浏览器不支持 audio 元素。