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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They ______ those who didn't conform to their ideas, and took advantage of those who agreed with them.
A．explored
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The Supreme Court ______ the judgement of the lower court in that case last week.
A．amplified
B．affirmed
C．ascended
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