one or two failure还是failtures?failure不可数吧.

one or two failure还是failtures?failure不可数吧. 是one or two year还是one or two years a year or two 还是one year or two one　or　two加名词单数还是复数,two　or　one there is one or two child 还是there is one or two children?为什么 there is one or two students?还是there are one or two students?为什么 one or two in one or two one or two a day or two,one or two days 后面的动词分别用单数还是复数? 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 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 one or two 加时间,谓语用单数还是复数?如：one or two hours （ ）enough. what's the relationship between success and failure?explain your opinion with one or two examples.答案回答在两分钟左右 one year or two one or two year 的意思 in one or two words