Who was it that won the US Open?
在美國公開賽上獲勝的是誰？
She made it her business to find out who was responsible.
她一定要查清楚到底該誰負責。
Who could forget his speech at last year's party?
誰能忘記他去年在聚會上的講話呢？
Who sets the standard for water quality?
水質標準由誰來制訂？
Who took the decision to go ahead with the project?
是誰決定繼續這項工程的？