单项选择题

Previous research has established the lupine wolf as the ------- of the modern canine, but when and where humans first domesticated the former into the latter remains unclear.

A． competitor
B． ally
C． scion
D． prey
E． progenitor
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单项选择题
Except in times of -------, we would scarcely allow public officials to declare states of emergency that replace some normal rules with those more ------- to extraordinary circumstances.
A． debate … diffident
B． serenity … indifferent
C． catastrophe … germane
D． obedience … ill-suited
E． disaster … hostile
单项选择题
An excellent philatelist can detect a forged ------- with a single glance, for a true specimen bears markings and characteristics, without exception, that the ------- invariably lacks.
A． painting … imitation
B． insect … approximation
C． coin … original
D． stamp … facsimile
E． treatise … falsehood
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