do you know who was the first one ___(arrive) here

问题描述:

do you know who was the first one ___(arrive) here

to arrive
the first one to arrive 第一个到达的人。

To arive
因为
be the first one to do
be the + 序数词 one to do

to arrive
the (first ) one这种用first、second(序数词)或者*修饰名词时需要在后面用to do的形式

arrived

to arrive

arriving
be(was)+Ving