the price of each of fruit .每一种水果,为什么要说成each of fruit ,而不说成f

the price of each of fruit .每一种水果,为什么要说成each of fruit ,而不说成f 香蕉是一种水果是Bananas is a kind of fruit.还是A banana is a kind of f each of whom和each of the Fruit of the Earth怎么样 改错:The price of each student is $9. each boy each of us each of the boys Price of each kilo.的中文 price of each kilo是神马意思? each of in different time of the year,the price of each kind of frui 为什么Eat lots of fruit and vegetables中fruit不加s,而vegetable加s, 为什么a lot of fruit fruit不加s而many fruits 加s