单选题Do you know the &nbs

问题补充：

单选题Doyouknowthegirl?A.5-years-oldB.5-year-oldC.5 years oldD.5-year-older

答案：

B解析本题主要考查词语与语句的区别，five-year-old是词语相当于形容词“五岁的”修饰后面的名词girl；5 years old是语句，为单词组合，故选B