They're people I met during the trip.

问题描述:

They're people I met during the trip.
这句话的主语应该是i吧
They're people 是met during the trip的宾语

他们就是我旅途中碰到的人.
其中,“他们”是主语,“人”是宾语,“是我旅途中碰到的”是定语.