【题目】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这种夺取成千上万人的神秘疾病的原因。A. cast light on使（问题等）较容易理解；B. caught hold of抓住；C. made sense of理解，领域；D. laid stress on重视，强调。A项符合语境。