单项选择题

The question was discarded because it was (ambiguous).

A．biased
B．tentative
C．vague
D．renowned
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单项选择题
He (claimed proudly) that he was the best swimmer in his school.
A．bragged
B．alleged
C．exclaimed
D．praised
单项选择题
The exploration of outer space is a great (triumph) of modern science.
A．superior
B．symbol
C．succession
D．success
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