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 overlooked
B.have overlooked
C.has been overlooked
D.is overlooked
答案:A
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。