I saw the surprise on everyone’s _________.

问题描述:

I saw the surprise on everyone’s _________.
face还是faces

I saw the surprise on their _________.

问题补充:那
I saw the surprise on their _________.
这就是复数了,大家的脸:faces
face
everyone’s face
每个人的一张张脸.
是每个人分别有的一张.