新
An investigation that is ---------- can occasionally yield new facts, even notable ones, but typically the appearance of such facts is the result of a search in a definite direction.
(A) timely
(B) unguided
(C) consistent
(D) uncomplicated
(E) subjective
〖解答〗
在以but连接的两个句子中分别两次涉及“研究”(investigation search)这一概念。从search后面的介词结构in a definite direction可求取其反义词(B) unguided。
〖中译〗
一种漫无目的，无的放矢式的研究偶尔能揭示出新的事实，甚至是引人瞩目的事实;但是，普遍而言，此类事实的出现是有着明确方向的探索带来的结果。