【題目】Recent research has ________ the causes of the mysterious disease that has claimed thousands of lives.
A.cast light on
B.caught hold of
C.made sense of
D.laid stress on

【答案】A
【解析】句意：最近的研究可以使人了解這種奪取成千上萬人的神秘疾病的原因。A. cast light on使（問題等）較容易理解；B. caught hold of抓住；C. made sense of理解，領(lǐng)域；D. laid stress on重視，強調(diào)。A項符合語境。

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