甲：who's the girl with ( ) 乙：she's my sister.A long hairB big earC small nose

甲：who's the girl with ( ) 乙：she's my sister.A long hairB big earC small nose
甲：who's the girl with ( ) 乙：she's my sister.
A long hair
B big ear
C small nose

甲：who's the girl with ( ) 乙：she's my sister.A long hairB big earC small nose
选A 【 long hair】
hair不可数,前面不用加冠词
ear和nose都可数,前面要加冠词a

A那个长头发的女孩是谁？他是我姐姐

应该选 A long hair 长发

B 提到 "耳朵“， C 讲的是 ”鼻子“，两者都是可数名词，前面必须加冠词 a 或者（耳朵）用复数+s。

头发不可数，不需要。