【題目】Many junior school students said the maths problems were difficult to _______.
A.try out
B.work out
C.look up
D.work up

【答案】B
【解析】句意：許多初中生說數(shù)學(xué)問題很難解決。try out試驗；work out解決；look up查找，往上看；work up逐步建立。根據(jù)句意可知B正確。

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