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This math problem is so hard that I can't ______ .Please give me some advice.
A. look out it          
B. work it out  
C. give it out
B

試題分析：句意：這道數學題如此難以至于我解答不出來，請給我一些建議。look out小心；當心；work  out計算出；give out分發，發出。根據句意此題應選B。
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