Ответ:

  1. Greg finished repairing his bicycle yesterday. — When did Greg finish repairing his bicycle? — Когда Грег закончил ремонтировать свой велосипед?
  2. Yesterday Nelly was working at her English from 5 till 7. — How long was Nelly working at her English yesterday? — Как долго Нелли вчера занималась английским?
  3. My sister is in the kitchen. — Where is your sister? — Где твоя сестра?
  4. Little Millie is brushing her teeth at the moment. — What is little Millie doing at the moment? — Что сейчас делает маленькая Милли?
  5. Aunt Pam got a postcard from her cousin two days ago. — When did Aunt Pam get a postcard from her cousin? — Когда тётя Пэм получила открытку от своей двоюродной сестры?