单项选择题

Although there are weeks of negotiations ahead, and perhaps setbacks and new surprises, leaders of both parties are ______ that their differences can be resolved.

A．optimistic
B．perplexed
C．incredulous
D．uncertain
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单项选择题
Their air of cheerful self-sacrifice and endless complaisance won them undeserved praise, for their seeming gallantry was wholly motivated by a ______ wish to avoid confict of any sort.
A．poignant
B．sincere
C．laudable
D．cowardly
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
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