DuoDuo is a great lone traveler crossing borders of nation, language and history, as well as a determined predictor of some of the most basic, universal human values that _____ in our troubled modern times.A.have been overlookedB.have overlookedC.has been overlookedD.is overlooked
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A解析that引导定语从句，先行词为values，意为在一团混乱的现代社会中所被忽视的价值观。