问题补充：
After several sleepless nights, Mr. Smith a perfect solution to the financial problems of his company.
A. kept up with
B. put up with
C. came up with
D. ended up with
答案：
A. kept up with
B. put up with
(答案→)C. came up with
D. ended up with
解析： A. kept up with跟上，B. put up with容忍，C. came up with提出，想出，D. ended up with以…结束，句意：几个无眠的夜晚后，斯密斯先生想出一个解决公司问题的完美的解决方法。所以选C。
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