单项选择题

What Dr．Brown and his team have discovered

A．Organisms far below the Earth’s surface.
B．New drilling methods.
C．A hidden underground world.
D．Rare and infectious bacteria.
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单项选择题
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.
单项选择题
What has the man been busy doing recently
A．Writing papers for his classes.
B．Preparing for the coming exam in the library.
C．Doing extra work in the chemistry lab.
D．Working overtime at a library.
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