【題目】The research lacks evidence, and therefore, its conclusions are doubtful.
A.solid
B.fierce
C.severe
D.potential

【答案】A
【解析】句意:這個(gè)研究缺乏可靠的證據(jù),因此,它的結(jié)論是值得懷疑的。A.solid“可靠的,可信賴的”; B.fierce“兇猛的,殘忍的 ”;C.severe“嚴(yán)峻的,嚴(yán)厲的 ”;D.potential“潛在的,可能的”。根據(jù)句意,選A。

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