◎ 题干
Mr Smith, looking ______, started to work out a        problem.
A.puzzled, puzzlingB.puzzling, puzzled
C.puzzled, puzzledD.puzzling, puzzling
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Mr Smith, looking ______, started to work out a problem.A.puzzled, puzzlingB.puzzling, puzzledC.puzzled, puzzledD.puzzling, puzzling…”主要考查了你对  【形容词的比较级】【形容词的最高级】【形容词的排序】【形容词】  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。