单项选择题

Gallup's system proved to be ______.

A．much cheaper
B．a great failure
C．a huge success
D．much costly
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单项选择题
From the passage we know that the earliest pre-election polls were ______ in reflecting the public opinions.
A．meaningful
B．inaccurate
C．satisfying
D．successful
单项选择题
We can infer from the passage that in the beginning the newspaper editors were______Gallup's system.
A．doubtful of
B．enthusiastic about
C．displeased with
D．indignant at
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