现在分词的时态和语态的练习

现在分词的时态和语态的练习

ls的回答。2加个because

3。After being led to visit the lab, we were took to the library

或者Having been led.........也可以(经楼上启发...)

翻译上有些词有点不恰当。。= =

不过重要的是语态么。。= =