who - was能縮寫麼

who was不能縮寫

例句

1、

Who was it that won the US Open?

在美國公開賽上獲勝的是誰

2、

She made it her business to find out who was responsible.

她一定要查清楚到底該誰負責。

3、

She made it her business to find out who was responsible.  

她一定要查清楚到底該誰負責。