【单选题】 DUBIOUS:
A.(A) inadvertent
B.(B) oblivious
C.(C) intentional
D.(D) skeptical
E.(E) certain
网考网参考答案:E
网考网解析:
To be dubious means to be "skeptical or uncertain," whereas to be certain means to be "sure or absolute." Therefore, certain is most nearly opposite in meaning to dubious.
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