问题描述：
Tom_____a third way to do the Maths problem,but it desn't work.A.found out B.thought C.looked for
Tom_____a third way to do the Maths problem,but it desn't work.
A.found out B.thought C.looked for D.tried
Tom_____a third way to do the Maths problem,but it desn't work.
A.found out B.thought C.looked for D.tried
问题解答：
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