Although there are weeks of negotiations ahead and perhaps setbacks and new surprises le
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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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正确答案：A
解析：(optimistic乐观的)。句意为：尽管离谈判还有几个星期，也许会出现挫折和新的意外，但是双方领导人都很乐观，认为他们的分歧是可以消除的。B．perplexed感到困惑的；C．incredulous不轻信的；D．uncertain不确知的。