Have you heard of it ? Firefighters rushed into a burning house, three of them unfortunate

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(答案→)A. caught; losing
B. catching; lost
C. caught; lost
D. catching; losing
解析：句意:你听说过吗？消防战士冲进燃烧的房子，其中的三人不幸被困住了，失去了生命。这里是独立主格结构，three of them与catch是被动关系，故用过去分词；three of them与lose之间是主动关系，故用现在分词，故选A。