I didn't meet him.He --- when I got there.(leave)在线等

I didn't meet him.He ___ when I got there.(leave)在线等
i didn't meet him.He ___ when I got there.(leave)
我答案上是显示has left,但是我觉的应该是过去完成时had left,应该I got there是说我到那时应该是过去啊,为什么答案是has left呢