Mr.Li often works very hard.When I ()him at eleven last night,he()in the office

问题描述:

Mr.Li often works very hard.When I ()him at eleven last night,he()in the office
saw worked
was seeing was worki
was seeing worked
saw was working
求说明下啊

选最后一个.第一个空,因为时间状语是last night,所以用一般过去式saw.第二个空表示我看到他的时候,他正在做...所以,用过去进行时.