单选题 ______, the factories had not closed, and those who needed work most were given a chance to survive during the econmic disaster.

【正确答案】 B

【答案解析】(mercifully幸运地)。句意为：幸好这些工厂没有关门，在经济灾难期间，极需工作的人有机会生存下去。A．unintentionally无意地；C．importunately强求地；D． tragically悲惨地。