He will be back in___.A one day or two B one o

He will be back in___.A one day or two B one o he will be back one day or two还是a day or two为什么 a day or two is enough 和one or two reasons are supported中的be one days or two days,one days or two,one or two day,one and I will be back one day I lost No one knows when he will be back "an or two days""one day or two""one or two days""one and tw 一两天是one day or two还是 a day or two a day or two 与 one day or two 的区别? in a day or two与in one day or two的区别? 简单的英语句子语法Will he be back in two days?Will he back in two day One day will be the