◎ 题干
         math problem is too difficult. I can't work it out.

A. The second           
B. second
C. Second              
D. Second one

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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ math problem is too difficult. I can't work it out.[ ]A. The secondB. secondC. Second D. Second one …”主要考查了你对  【定冠词(the)】【序数词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。