Who in the world is he?
彼はいったいだれだい
Who in their right mind would ever vote for him?
あいつに投票するなんて,正気ならだれもしない
Who is it?=Who's there?
(ドア越しに)どなたですか(◆Who is it?は電話では「どちら様ですか」の意味になる)
Who is next in line to the English throne?
だれが次に英国の王座につくのですか
Who is on the other end of the phone [the line]?
どちら様ですか
Who is the best prospect for ...?
…の一番候補はだれだ
Who is this, please?
(電話で)どちら様ですか
Who is to blame for his death?
彼が死んだのはだれのせいだ
Who killed Cock Robin?
コマドリを殺したのはだれか(◆Mother Gooseの歌の一節;政治家更迭の黒幕はだれかなどの意に用いる)
Who knows but that everything will come out right?
((形式))万事うまくゆくかもしれない