Change the questions using: Do you know...? 1) Where does Tom work? 2) What time has he left for London? 3) How did it happen? 4) When did they finish working? 5) How much did she pay for her outfit? Помогите, пожалуйста.

Это так называемые "косвенные вопросы" (indirect questions) .В них после введения 'Do you know..' то, что было вопросом, становится обычным утвердительным предложением: Do you know where Tom works? Do you know what time he has left for London? Do you know how it happened? Do you know when they finished working? Do you know how much she paid for her outfit?