1)
1-Who often receives engineers from factories?
2-Whom does this engineer often receive?
2)
1-Whose working day usually lasts eight hours?
2-What usually lasts eight hours?
3-How long does our father's working day usually last?
3)
1-What is he going to do with my book in four days?
2-What is he going to give back in four days?
3-When is he going to give my book back?
4)
1`-What (Where) (=оба вопросительных слова допустимы в этом вопросе, так как мы можем спросить "откуда" (where) она переводит статьи, и из чего? =данный вариант предпочтителен!(what)) does John's sister sometimes translate articles from?