单项选择题

Of all the speech organs, the ______ is the most flexible.

A．lip
B．mouth
C．vocal cords
D．tongue
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Tough as the task was, we ______ finish it ahead of time and therefore we were highly praised for it.
A．would
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That government of the people, by the people, for the people, are the words by ______.
A．Thomas Jefferson
B．Abraham Lincoln
C．Andrew Johnson
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