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

A day or two is enought for a day or two 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 within a day or two的意思 选择He is going to have a holiday for ()?A a day or two days B one or two days C a year and 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 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? --How long will you stay there?--For__.A.one and two days B.one and two day C.one or two day D.a day or two I'll be back in __________a one day or twob a day or twoc a or two daysd one day or two days选哪个？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? Sometimes they eat it two or three times a day. He’ll have to spend ____ writing hie report here.A.one day or two days; B.one day or two; C.a day or two days ; D.a day or two选D为什么不选A啊 a day or two的同义短语是什么? He'll have to spend ______ writing his report here.A.one day or two days B.one day or two C.a day or two days D.a day or two in a day or two与in one day or two的区别?He will be back in a day or two为什么不能说He will be back in one day or two? 单选You can return the book in _____.You can return the book in _____.A one or two day B one day or two C a day or two D one day or two days为什么?