This is my old photo of my aunt’s when she had . And now she has a few .
A. short hair; grey hairs
B. short hairs; grey hair
C. short hair; grey hair
D. short hairs; grey hairs
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(答案→)A. short hair; grey hairs
B. short hairs; grey hair
C. short hair; grey hair
D. short hairs; grey hairs
解析：表示“全部头发”时，hair是不可数名词，表示“若干根头发；部分头发”时，hair是可数的具体名词。