This is an old photo of hers when she had___and now she has some___

问题描述:

This is an old photo of hers when she had___and now she has some___
A.short hair ,grey hair
B.short hair,grey hairs
为什么不能选A呢?

当用some来修饰hair的时候,意指只是有一些白头发,而不是全部都是白头发,所以用复数的hairs.