"Show me the fruit!"
It's like Jerry Macguire but with grocers.
"fruit" as in a single fruit..? Shouldn't the vendor be showing fruits..?
In English (unlike Russian) "fruit" can be used as a mass noun so both "fruit" and "fruits" are accepted.
Its right to say, ...свою фрукты?
It is not. Фрукты is the plural of фрукт.
why is the ''vendour is showing him the fruit'' wrong?
"The vendor is showing him the fruit" is accepted.