◎ 题干
" How old is her sister?" "________."
[     ]
A. It's ten years old  
B. She's ten years old
C. She's ten years' old  
D. She is ten year's old
◎ 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“" How old is her sister?" "________."[ ]A. It's ten years old B. She's ten years old C. She's ten years' old D. She is ten year's old…”主要考查了你对  【特殊疑问句】  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。