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.
Which is the largest public library in the United States

A．The Library of Congress.
B．The Harvard University Library.
C．The Chicago Public Library.
D．The New York Public Library.
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单项选择题
The underwater listening system was originally designed ______.
A．to trace and locate enemy vessels
B．to monitor deep-sea volcanic eruptions
C．to study the movement of ocean currents
D．to replace the global radio communications network
单项选择题
In what class is this lecture probably being given
A．History.
B．Physical education.
C．Botany.
D．Architecture.
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