Fruit are good for us.fruit要用单数还是复数 为什么

Fruit are good for us.fruit要用单数还是复数 为什么 freshi fruit用单数还是复数? vegetables and fruit are good for a_____ of us star,fruit是单数还是复数 fruit and vegetables are healthy food 为什么food用单数? fruit and vegetables are good for our health?为什么用health eating fruit is good for our health 为什么用health food,fruit,snack,vegetable,drink应该用单数还是复数,加S吗?谓语用单数还是复数? Vegetables fruit and fish are/is good for...选择are还是is Eating lots of fruit and vegetables is good for us Lots of fruit is good for us.翻译成中文, Vegetables and fruit is good for our health中为什么要用is