◎ 题干
He turned ________ ten years ago but later he became ________.  
[     ]
A. a teacher; a doctor    
B. teacher; doctor  
C. teacher; a doctor    
D. a teacher; doctor
◎ 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“He turned ________ ten years ago but later he became ________. [ ]A. a teacher; a doctor B. teacher; doctor C. teacher; a doctor D. a teacher; doctor…”主要考查了你对  【名词】【不定冠词】  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。