Mary is a ()girl.A.9-year-old B.9 years old c.9 year old D.9-years-old

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Mary is a ()girl.A.9-year-old B.9 years old c.9 year old D.9-years-old

Mary is a ()girl.A.9-year-old B.9 years old c.9 year old D.9-years-old
Mary is a ()girl.
A.9-year-old B.9 years old c.9 year old D.9-years-old

Mary is a ()girl.A.9-year-old B.9 years old c.9 year old D.9-years-old
选A
Mary is a (9一year一old)girl
如还有新的问题,请不要追问的形式发送,另外发问题并向我求助,

答案:A

100%正确。

满意请采纳,谢谢!

A 和B貌似都对啊 不过推荐选A

只能选A, 9-year-old 表示一个形容词,做定语,意思是"九岁大的"
如果用B的话,B只能做表语,不能做定语,可以这样说:
Mary is 9 years old.

正确:A
9-year-old是个复合形容词,修饰后面的名词girl,此时,必须加上连字符,同时其中的名词year只能使用单数形式。