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An investigation that is _______ canoccasionally yield new facts, even notable ones, but typically the appearance of such facts is theresult of a search in a definite direction.
(A) timely
(B) unguided
(C) consistent
(D) uncomplicated
(E) subjective
正确答案:B
解析：
1.关键字：“but”
2.空中应该填入一个形容词，是对于“an investigation”的一种形容;
3.后半句中有but出现，应该是与前半句表达相反的意思，而后半句中的“a search”是前半句中的“an investigation”的同义替换，因此空中应该填入一个与在后半句中形容search相反的词语，即“not in a definite direction”。
4.词语解释
[1].(A) timely：(及时的)appropriate or adapted tothe times or the occasion
[2].(B) unguided：(没有导向的)not to direct, supervise, or influence usually to aparticular end
[3].(C) consistent：(一致的)marked by harmony,regularity, or steady continuity
[4].(D) uncomplicated：(不复杂的)not difficult to analyze,understand, or explain
[5].(E) subjective：(主要的)of or relating to theessential being of that which has substance, qualities, attributes, orrelations
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