his bed-room is always at sixs and sevens为什么要加S,这句话什么意思
问题描述：
his bed-room is always at sixs and sevens为什么要加S,这句话什么意思
与his bed-room is always at sixthand seventh 有什么区别
答
晕 at sixs and sevens是固定短语 意思为乱七八糟 当然不能把S去掉