GRE考试

根据网考网考试中心的统计分析，以下试题在2019/3/28日GRE考试习题练习中，答错率较高，为：64%
【单选题】Few mathematicians are ------- their futures on finding any such proof; instead, their efforts are focused on finding good, but not -------, solutions for most cases, a field of study aptly known as approximation theory.


A．betting … perfect
B．developing … convenient
C．pinning … substandard
D．destroying … exact
E．(E) establishing … vague