单选题
In less than four months, 1,700 asylum seekers, ______civil wars, dire economic conditions and systematic repression, have perished in the sea.
【正确答案】
B
【答案解析】解析：本题考查非谓语动词。分析句子结构可知，句子主干为1，700 asylum seekers have perished in the sea，结合四个选项判断，本空所填词应为非谓语动词，其逻辑主语为句子的主语，应用现在分词，flee为及物动词，后直接接宾语，故选[B]项。