one fifth of them后面跟is还是are

one fifth of them后面跟is还是are none of them 后面应该跟is还是are? none of them 后面加are 还是is?比如None of them is还是are Chinese? no one of them is here .是is 还是 are one of the boys 后面加is 还是are one percent of 10 sheep 后面用is 还是are? two kilos of salt 后面跟are 还是is? a bowl of noodles 后面是跟is还是are not one of them is/are? Each of them are还是is clever. Neither of them 是is还是are 不可数名词 后面跟is 还是are?