The factory ----- Mr Li used to work was closed last week.填where 还是which ..
问题描述：
The factory ----- Mr Li used to work was closed last week.填where 还是which ..
理由
答
where
因为这里的先行词并不是从句中的宾语或者主语,所以这里要用关系副词where
我再举个例子：
The factory which Mr Li used to work in was closed last week.
这种情况下,先行词是从句中的介词的宾语,所以要用which