You can’t predict everything. Often things don’t as you expect.A. run outBwork outC. br

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A. run out
(答案→)B. work out
C. break out
D. put out
解析：run out用完；实现，计算出；break out爆发；put out熄灭，出版。句意：你不可能能预测一切事情，经常事情不会像你预料的那样。故选B。