◎ 题干
Did he write all the articles _________ or did anyone help him?
[    ]
A. in person  
B.,in a person  
C. in the persons  
D. in persons
◎ 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“Did he write all the articles _________ or did anyone help him?[ ]A. in person B.,in a person C. in the persons D. in persons…”主要考查了你对  【介词短语】  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。