题目内容

 He is ________,  and he has ________ sister. 

A. ten years old;  an eight-year-old

B. ten-years-old;  an eight years old

C. ten year old;  eight-year-old

D. ten years old;  a eight-year-old

【解析】选A。表达某人的年龄用结构“主语+be+数字+years+ old (数字>1)”;作定语时此结构为“数字-year-old”,  year必须用单数。故选A。

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