Two is enough.为什么用is?主语是?

Two is enough.为什么用is?主语是? Two day is enough.3kilometers is not far from.为什么都用is? two more days is enough Two hours is enough for us to finish the experiment为什么要用介词for two days is not enough,he needs a third day为什么用a third Two thousand dollars is enough for the car.此句里的be动词为什么用is而不是用are? Two kilos of fish is enough.语句是否正确?这里面的IS用的对吗?这是用are?为什么?急用! Two glasses---------enough填is 还是 are enough is enough 歌词 enough is enough 歌词 enough is 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 Two days __ enough gor me.A.is B.are Another two days （ is/are ） enough.选哪个? I think two cups of yogurt_____(is或are)enough. two hour __is__（be）enough for us to finish the work.请解释为什么用is,尽快,谢谢(☆_☆) this is their two children 为什么用this is? The table is ________ for two people.A.not big enough B.big not enough C.big enough not