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In those days, our ________ concern was to provide people who were stopped by the snow storm with food and health care.
A.normalB.constantC.permanent D.primary
D

根据题意,在那些时候,我们主要的任务是给那些被暴风雪阻挡的人们提供食物和医疗救助,primary符合题意,normal表示正常的, constant表示恒定的 permanent表示永久的。
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