◎ 题干
I ______ have a red ball pen.        
[     ]
A. don't                      
B. am not            
C. isn't                            
D. doesn't
◎ 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“I ______ have a ball. [ ]A. don't B. am not C. isn't D. doesn't …”主要考查了你对  【主谓一致】  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。