单项选择题

Although Ms. Brown found some of her duties to be ______, her supervision of forty workers was a considerable responsibility.

A．ambiguous
B．provisional
C．menial
D．unique
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单项选择题
Although Darwinism was a profoundly ______ world view, it was essentially passive, since it prescribed no steps to be taken, no victories over nature to be celebrated, no program of triumphs to be successively gained.
A．limited
B．debatable
C．innovative
D．paradoxical
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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