针对楼主的问题补充:
fruits.
这里可以用复数。
fruit
一般是不可数的,
唯一的可能性是在指不同种类的水果的时候。
food
复数的情况很少
指一种食物的时候是可数的。
不同类的食物品种用复数。
表示单纯的食物、水果时不可数
比如
I'm
hungry.
I
want
some
food.
There
is
some
fruit
on
the
table.
表示几种食物、水果时可数
We
have
a
lot
of
foods.
Fish,
meat,
chicken,
which
one
would
like?
All
kinds
of
fruits
are
available,
including
apples,
pears,
peaches,
bananas
and
oranges.