The professor advised us to think outside the box and to new, different, or unusual soluti

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A. put up with
(答案→)B. e up with
C. keep up with
D. catch up with
解析：考查短语辨析。put up with 忍受，e up with      想出，keep up with 齐头并进，catch up with赶上，句意：教授建议我们思考开阔一些想出新的，不同的或不寻常的解决方案。所以选B。