he will be back one day or two还是a day or two为什么

he will be back one day or two还是a day or two为什么 He will be back in___.A one day or two B one o 一两天是one day or two还是 a day or two a day or two is enough 和one or two reasons are supported中的be a day or two,one or two days 后面的动词分别用单数还是复数? 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? for a day or two one days or two days,one days or two,one or two day,one and "an or two days""one day or two""one or two days""one and tw 问下用英文说“一天或两天”咋说?是“a day or two”,“a day or two days”,“one day 有没有：one day or two