______ these questions may sound specific, answers to them could have profound economic and political significance.

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问题 ______ these questions may sound specific, answers to them could have profound economic and political significance.

选项 A、Since
B、Unless
C、Lest
D、While

答案D

解析 本题考查状语从句。该句意为“虽然这些问题可能是具体的,但是回答这些问题会有深远的经济和政治意义”。specific“具体的”和profound“深远的”之间从逻辑关系上看应是转折关系。虽然这四个选项都可引导从句,但从词义上看since“因为,既然”,unless“除非”, lest“以免”都不符合题意,只有选项D while“虽然,尽管”正确。
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