Bob and Tom are good ( ).a.brother b.friend c.Bob and Tom are good ( ).a.brother b.friend c.friends d.brother and sister 选什么?为什么?

问题描述:

Bob and Tom are good ( ).a.brother b.friend c.
Bob and Tom are good ( ).a.brother b.friend c.friends d.brother and sister 选什么?为什么?

C,因为are后面跟复数形式.