单项选择题

If animal parents were judged by human standards, the cuckoo would be one of nature's more creatures, blithely laying its eggs in the nests of other birds, and leaving the incubating and nurturing to them.

A．mettlesome
B．industrious
C．domestic
D．irresponsible
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单项选择题
He gradually ______ that her parents had been right and his decision had to be modified.
A．perceived
B．pioneered
C．plagued
D．transformed
单项选择题
He was widely regarded as a ______ man because he revealed daily his distrust of human nature and human motives.
A．disrespectful
B．cynical
C．confused
D．misinformed
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