We were together in the Thursday night drama society.
我们过去总在星期四晚上的话剧社团聚会。
I know the boy whose father is a missionary.
我知道那个男孩的父亲是传教士。
Yes, I see. How can they get rid of waste water in this way? What a terrible colour the sea is now! It looks as if our class won't be able to bathe at all.