fruit和vegetable有相似之处,当它们在表示整体的时候不用复数,表示种类的时候要用复数.
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What's your favorite fruit/vegetable?你最喜欢的蔬菜/水果是什么?此处“蔬菜”和“水果”都是一类东西的统称,所以不加S
但具体到某一类时,要加s
Take a look at the list of fruits below.Chooseyour favorite one.---看看以下的水果列表,选出你最喜欢的一种.
there were different kind of vegetables in the yard.院子里有很多不同种类的蔬菜.