--- What do you think of the math problem ? --- It’s very hard and nobody has _______.
A．put it out
B．helped it out
C．worked it out
D．solve
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“--- What do you think of the math problem ? --- It’s very hard and nobody has _______.A．put it outB．helped it outC．worked it outD．solve…”主要考查了你对 【实义动词的单数第三人称形式】，【实义动词】，【动词短语】 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。
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