I sent a wedding invitation to a friend ,but unfortunately_____ could not attend my wedding ceremony

问题描述:

I sent a wedding invitation to a friend ,but unfortunately_____ could not attend my wedding ceremony
A.who B.one C.she D.that
选哪一个?为什么?请详细一点,

选C,我发了婚礼邀请给一个朋友,但是不幸的是她来不了
不能选B因为不是泛指,泛指时才用one
不能选A,D,如果去掉逗号和but就可以选A或D了