The people in the war area have food. They are in a very difficult situation.
A. run out
B. used up
C. been run out of
D. been used up
网友回答
A. run out
(答案→)B. used up
C. been run out of
D. been used up
解析：句意：战区的人们已经用完了食物，他们的处境很难。run out用完，耗尽； use up 用完，耗尽； 因为这里是人们做主语，所以用完某物不用被动语态；sb run out of sth某人用完某物。故选B。