一两天 是a day or two 还是one day or two

一两天是one day or two还是 a day or two 一两天 是a day or two 还是one day or two he will be back one day or two还是a day or two为什么 a day or two,one or two days 后面的动词分别用单数还是复数? for a day or two within a day or two的意思 A day or two is enought it is a good idea to remember one or two words a day 还是 it is a good idea to remember one or two word a day you will have to spend_writing your report herea.one day or two days b.one day or two c.a day or two d.two days or one答案是c 为什么 i hear he will come in_ a .a day or two b.one day or two c.one and two days d.one day or two days 请从语法角度 选择啊正确答案是A 为什么不选b？ I have two days off 我有两天的假期短线格式是什么样的?一定要用day off 词组是I have two-day-off 还是 I have two-day off 还是其他的? a year or two 还是one year or two take two capsules a day with a meal的意思到底是一次性吃两粒 还是一次一粒 分两次 a day or two is enough 和one or two reasons are supported中的be动词不同是因为主语的单复数不同还是意思的不同?前者为什么用is 后者为什么用are 求详解 是one or two year还是one or two years It will take us ____to finish the workA.a day or two B one or two day C a day and two D one or two days.为什么? 英语中一两分钟怎么表达?是one or two minutes 还是one minute or two 还是 a minute or two The biologist has been here for ______.A.one day or two B.one or two days C.a day or two days D.one and two days答案是选B的,可是我觉得A,C也可以啊,请问这是为什么啊?英语书上有这样的用法a tear or two =one or two tears