The main character of this game is girl. She saves her father in the end.A. a 15 years old

问题补充：

The main character of this game is girl. She saves her father in the end.

A. a 15 years old

B. a 15-year-old

C. a 15-years-old

D. an 15-years-old

答案：

A. a 15 years old

(答案→)B. a 15-year-old

C. a 15-years-old

D. an 15-years-old

解析：英语中两个或多个单词中间可以用短横线连接起来，起一个相当于形容词的作用，这类单词叫做合成词。其一般构成规则就是其构成单词一般都要用原形。句意:这部戏的主角是一个十五岁的女孩。他最终救了她的父亲。Fifteen的词首音素是辅音，故不定冠词用a，结合语境可知选Ｂ。