bread and butter is their daily food为什么填is可是有连词AND

问题描述:

bread and butter is their daily food为什么填is
可是有连词AND

应该是因为 bread and butter 是一个整体 “黄油面包”,所以虽然用了连词and连接,但其实就相当于是一个词.therefore,用单数.