GRE考试

根据网考网考试中心的统计分析，以下试题在2017/11/25日GRE考试习题练习中，答错率较高，为：42%
【单选题】 If the contagious nature of yawning is a means of communication within groups of animals, possibly as a means to______behavior, yawning in humans is most likely ______and an evolutionarily ancient mechanism that has lost its significance.
A．(A) clarify… substantial
B．(B) mirror… minimal
C．(C) synchronize … vestigial
D．(D) temporize… analogous
E．(E) interrupt… pernicious

网考网参考答案：C，答错率：42%
网考网试题解析：
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