单项选择题

______ is well-known for its important role in the American space navigation program.

A．Atlanta
B．Houston
C．Seattle
D．Dallas
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单项选择题
Britain has the following papers except ______.
A．The Daily Telegraph
B．The Guardian
C．Christian Science Monitor
D．The Times
单项选择题
The sentence Have you stopped beating your wife is an instance of ______.
A．presupposition
B．entailment
C．implicature
D．meaning extension
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