3道英语句子求高手帮忙修改下.

问题描述:

3道英语句子求高手帮忙修改下.
I usually go to college by bus.
We have just finished painting the room.
They still were waiting when we arrived.

1.I usually go to college by bus.(此句很好,没有错)2.We have just finished painting the room.(此句也很好,没有错)3.They still were waiting when we arrived.(此句可略作修改:They had been still waiti...