---Has Li Lei finished his work today?--- I have no idea,but he ______ it when I saw him ……

问题描述:

---Has Li Lei finished his work today?--- I have no idea,but he ______ it when I saw him ……
---Has Li Lei finished his work today?
--- I have no idea,but he ______ it when I saw him this morning.(conduct)

was conducting
过去那时候正在做的事情