单项选择题

A comet is distinguished from other bodies in the solar system ______.

A．into its appearance
B．off its appearance
C．by its appearance
D．to its appearance
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单项选择题
As for the missing funds, the company manager, when demanded to give an explanation, could not even come up with a ______ one.
A．plaintive
B．pervasive
C．perpetual
D．plausible
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