为什么选 c

问题描述:

为什么选 c
He invited all of his ______ to join his wedding party 浏览次数:73次悬赏分:0 | 提问时间:2011-6-8 22:47 | 提问者:虾虾好
A.comrade-in-arms
B.comrades-in-arms
C.comrades-in-arm
D.comrade-in-arm

B为什么从字典上看 comrade-in-arms是有单复数之分的那么,这个表复数的s一定是加在名词comrade后面的, 没comrade-in-arm这种表达