这个句子是有错的,正确的答案如下:
They arrived at the top of the mountain.
arrive at ,到达,
on the top of ,在,的顶部,单独用作状语.可将They arrined 和 on the top of the mountain分别单独看作一个整体吗？（arrive本身也是不及物呀！）不能.不及物动词要先变为及物动词短语才能 接宾语.所以先要有arrive at ,后面再接宾语the top of the mountain.请看以下面的句子.On the top of the house, there is a flag.