There____a box of apples outside the door.填is 还是are ?

There____a box of apples outside the door.
填is ,因为主语是 a box ,一箱苹果。
There are some boxes of apples outside the door.
填are 因为主语是 boxes ,及箱苹果。

is

is

is

is 就近原则

is

后面已经有了a，就说明这个是一个单数，单数就用is，如果是复数，那就用are，如果是复数的话，这个句子形式会是这样：
There are some box of apples outside the door．