单选题
The 50th anniversary is a ______ that very few companies actually manage to reach.
(A) commitment
(B) milestone
(C) variation
(D) yield
A
B
C
D
【正确答案】
B
【答案解析】
[词汇] milestone里程碑，划时代的事件
[错误答案] (A)献身(C)变化，波动(D)产量
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