"an or two days""one day or two""one or two days""one and tw

"an or two days""one day or two""one or two days""one and tw one days or two days,one days or two,one or two day,one and a day or two,one or two days 后面的动词分别用单数还是复数? 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 one or two in one or two most american families have one or two parents and one or tw 有没有：one day or two Four and two is one or zero? 是one or two year还是one or two years one year or two one or two year 的意思 a year or two 还是one year or two