I’m sure that he will be back in ____.A.a day or two B.one day or two C.a or two days D.one or two day选哪个?为什么?

问题描述:

I’m sure that he will be back in ____.
A.a day or two B.one day or two C.a or two days D.one or two day
选哪个?为什么?

选A
a day or two = one or two days: 一两天
in a day or two/ in one or two days: 在一二天里

B,一两天
习惯用法

A
这才是习惯用法
或者用one or two days

选B.one和two是对应的,而D的day后面应该加s就对了.B省略了day避免罗嗦