◎ 题干

From his       looks, we can decide that he’s come across       problems.
A.puzzling; troubled B.puzzling; troubling C.puzzled; troublesomeD.puzzled; troubled
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“From his looks, we can decide that he’s come across problems.A.puzzling; troubled B.puzzling; troubling C.puzzled; troublesomeD.puzzled; troubled…”主要考查了你对  【可数名词及其单复数】【集合名词】【名词】  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。