Who was it that won the US Open?

　　在美國(guó)公開賽上獲勝的是誰(shuí)？

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

　　她一定要查清楚到底該誰(shuí)負(fù)責(zé)。

　　Who could forget his speech at last year's party?

　　誰(shuí)能忘記他去年在聚會(huì)上的講話呢？

　　Who sets the standard for water quality?

　　水質(zhì)標(biāo)準(zhǔn)由誰(shuí)來(lái)制訂？

　　Who took the decision to go ahead with the project?

　　是誰(shuí)決定繼續(xù)這項(xiàng)工程的？