◎ 题干
Peter and John are Mr Brown's sons. They are the same age (一样大) and look the same.
I think they are _____.
[     ]
A. a twin
B. twin sisters
C. cousins
D. twin brothers
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Peter and John are Mr Brown's sons. They are the same age (一样大) and look the same. I think they are _____. [ ]A. a twin B. twin sisters C. cousins D. …”主要考查了你对  【可数名词(单数名词,复数名词)】  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。