单选题
Due to ______ beyond the airline's control, all flights out of our hub in Frankfurt have been canceled until further notice.
(A) circumstances
(B) episodes
(C) qualifications
(D) instances
A
B
C
D
【正确答案】
A
【答案解析】
[词汇] circumstance情况
[错误答案] (B)事件(C)资格(D)实例，情况
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