so的.例句：
1、There wasn't much traffic so we made good progress.
來往車輛不多，所以我們開得很快。
2、I've got my own room so I'm well off.
我有自己的房間，所以還不錯。
3、 It wasn't so good as last time.
這次不如上次好。
4、There are so many different makes to choose from.
有很多不同的型號可供選擇。
5、Why do you make things so difficult for yourself?
你為什么這樣跟自己過不去？