定语从句we arrange them in the order they happened省略的关系词是什么?在从句中充当什么成分?如果充当宾语,完整的从句主谓宾形式应该怎么写?是“they happened the order”吗?不能是they happened in the order,因为从句修饰的是先行词the order.如果不是宾语,为什么还省略关系词?或者是省略了in which,

I thought I would be able to do lil' write-ups at my leisure and then arrange them in the order that they happened but apparently I can not.
这是英文的原文，因此填that
These sentences are about the story of Aladdin. Arrange them into the order in which they happened by numbering them from 1 to 8.
也可以用in which

这个是定语从句
we 主语 arrange 谓语them 宾格 in the order 状语
然后 后面跟了一个定于从句 省略了that/which
they happened the order 他们发生在顺序
order是先行词,同时是作为宾语从句在宾格 是可以省略的