I eat fruit 为什么 fruit不加S

为什么Eat lots of fruit and vegetables中fruit不加s,而vegetable加s, we eat lots of vegetables and fruit 为什么fruit不加s buy some fruit fruit为什么不加s What is your favonte fruit?为什么FRUIT不加S呢.I like bananas best. We want some fruit.和 He can eat fruits.为什么一个加S一个不加? 请问:Eat some vegetables and fruit every day.为何fruit不加s? 为什么fruit可以不加s也可以加s? 为什么fruit不加s,而vegetable加s 为什么a lot of fruit fruit不加s而many fruits 加s 水果沙拉的英语是fruit salad吗?如果是,为什么fruit不加s? Do you have any fruit 为什么不加s i like fruit for lunch.fruit加S吗